Switch header convention from #include "SDL.h" to #include <SDL3/SDLh>

I ran this script in the include directory:
```sh
sed -i '' -e 's,#include "\(SDL.*\)",#include <SDL3/\1>,' *.h
```

I ran this script in the src directory:
```sh
for i in ../include/SDL3/SDL*.h
do hdr=$(basename $i)
   if [ x"$(echo $hdr | egrep 'SDL_main|SDL_name|SDL_test|SDL_syswm|SDL_opengl|SDL_egl|SDL_vulkan')" != x ]; then
        find . -type f -exec sed -i '' -e 's,#include "\('$hdr'\)",#include <SDL3/\1>,' {} \;
    else
        find . -type f -exec sed -i '' -e '/#include "'$hdr'"/d' {} \;
    fi
done
```

Fixes https://github.com/libsdl-org/SDL/issues/6575

src/audio/SDL_audio.c

@@ -22,8 +22,6 @@
 
 /* Allow access to a raw mixing buffer */
 
-#include "SDL.h"
-#include "SDL_audio.h"
 #include "SDL_audio_c.h"
 #include "SDL_sysaudio.h"
 #include "../thread/SDL_systhread.h"

src/audio/SDL_audiocvt.c

@@ -22,13 +22,9 @@
 
 /* Functions for audio drivers to perform runtime conversion of audio format */
 
-#include "SDL.h"
-#include "SDL_audio.h"
 #include "SDL_audio_c.h"
 
-#include "SDL_loadso.h"
 #include "../SDL_dataqueue.h"
-#include "SDL_cpuinfo.h"
 
 #define DEBUG_AUDIOSTREAM 0
 

src/audio/SDL_audiodev.c

@@ -29,7 +29,6 @@
 #include <sys/stat.h>
 #include <unistd.h> /* For close() */
 
-#include "SDL_stdinc.h"
 #include "SDL_audiodev_c.h"
 
 #ifndef _PATH_DEV_DSP

src/audio/SDL_audiodev_c.h

@@ -22,7 +22,6 @@
 #ifndef SDL_audiodev_c_h_
 #define SDL_audiodev_c_h_
 
-#include "SDL.h"
 #include "../SDL_internal.h"
 #include "SDL_sysaudio.h"
 

src/audio/SDL_audiotypecvt.c

@@ -20,9 +20,7 @@
 */
 #include "../SDL_internal.h"
 
-#include "SDL_audio.h"
 #include "SDL_audio_c.h"
-#include "SDL_cpuinfo.h"
 
 #ifdef __ARM_NEON
 #define HAVE_NEON_INTRINSICS 1

src/audio/SDL_mixer.c

@@ -22,9 +22,6 @@
 
 /* This provides the default mixing callback for the SDL audio routines */
 
-#include "SDL_cpuinfo.h"
-#include "SDL_timer.h"
-#include "SDL_audio.h"
 #include "SDL_sysaudio.h"
 
 /* This table is used to add two sound values together and pin

src/audio/SDL_sysaudio.h

@@ -23,8 +23,6 @@
 #ifndef SDL_sysaudio_h_
 #define SDL_sysaudio_h_
 
-#include "SDL_mutex.h"
-#include "SDL_thread.h"
 #include "../SDL_dataqueue.h"
 #include "./SDL_audio_c.h"
 

src/audio/SDL_wave.c

@@ -33,8 +33,6 @@
 
 /* Microsoft WAVE file loading routines */
 
-#include "SDL_hints.h"
-#include "SDL_audio.h"
 #include "SDL_wave.h"
 #include "SDL_audio_c.h"
 

src/audio/aaudio/SDL_aaudio.c

@@ -22,8 +22,6 @@
 
 #if SDL_AUDIO_DRIVER_AAUDIO
 
-#include "SDL_audio.h"
-#include "SDL_loadso.h"
 #include "../SDL_audio_c.h"
 #include "../../core/android/SDL_android.h"
 #include "SDL_aaudio.h"

src/audio/alsa/SDL_alsa_audio.c

@@ -37,13 +37,10 @@
 #include <signal.h>             /* For kill() */
 #include <string.h>
 
-#include "SDL_timer.h"
-#include "SDL_audio.h"
 #include "../SDL_audio_c.h"
 #include "SDL_alsa_audio.h"
 
 #ifdef SDL_AUDIO_DRIVER_ALSA_DYNAMIC
-#include "SDL_loadso.h"
 #endif
 
 static int (*ALSA_snd_pcm_open)

src/audio/android/SDL_androidaudio.c

@@ -24,7 +24,6 @@
 
 /* Output audio to Android */
 
-#include "SDL_audio.h"
 #include "../SDL_audio_c.h"
 #include "SDL_androidaudio.h"
 

src/audio/coreaudio/SDL_coreaudio.m

@@ -24,8 +24,6 @@
 
 /* !!! FIXME: clean out some of the macro salsa in here. */
 
-#include "SDL_audio.h"
-#include "SDL_hints.h"
 #include "../SDL_audio_c.h"
 #include "../SDL_sysaudio.h"
 #include "SDL_coreaudio.h"

src/audio/directsound/SDL_directsound.c

@@ -24,9 +24,6 @@
 
 /* Allow access to a raw mixing buffer */
 
-#include "SDL_timer.h"
-#include "SDL_loadso.h"
-#include "SDL_audio.h"
 #include "../SDL_audio_c.h"
 #include "SDL_directsound.h"
 #include <mmreg.h>

src/audio/disk/SDL_diskaudio.c

@@ -28,9 +28,6 @@
 #include <stdio.h>
 #endif
 
-#include "SDL_rwops.h"
-#include "SDL_timer.h"
-#include "SDL_audio.h"
 #include "../SDL_audio_c.h"
 #include "SDL_diskaudio.h"
 

src/audio/disk/SDL_diskaudio.h

@@ -23,7 +23,6 @@
 #ifndef SDL_diskaudio_h_
 #define SDL_diskaudio_h_
 
-#include "SDL_rwops.h"
 #include "../SDL_sysaudio.h"
 
 /* Hidden "this" pointer for the audio functions */

src/audio/dsp/SDL_dspaudio.c

@@ -36,8 +36,6 @@
 
 #include <sys/soundcard.h>
 
-#include "SDL_timer.h"
-#include "SDL_audio.h"
 #include "../SDL_audio_c.h"
 #include "../SDL_audiodev_c.h"
 #include "SDL_dspaudio.h"

src/audio/dummy/SDL_dummyaudio.c

@@ -22,8 +22,6 @@
 
 /* Output audio to nowhere... */
 
-#include "SDL_timer.h"
-#include "SDL_audio.h"
 #include "../SDL_audio_c.h"
 #include "SDL_dummyaudio.h"
 

src/audio/emscripten/SDL_emscriptenaudio.c

@@ -22,7 +22,6 @@
 
 #if SDL_AUDIO_DRIVER_EMSCRIPTEN
 
-#include "SDL_audio.h"
 #include "../SDL_audio_c.h"
 #include "SDL_emscriptenaudio.h"
 

src/audio/haiku/SDL_haikuaudio.cc

@@ -32,7 +32,6 @@
 extern "C"
 {
 
-#include "SDL_audio.h"
 #include "../SDL_audio_c.h"
 #include "../SDL_sysaudio.h"
 #include "SDL_haikuaudio.h"

src/audio/jack/SDL_jackaudio.c

@@ -22,11 +22,8 @@
 
 #if SDL_AUDIO_DRIVER_JACK
 
-#include "SDL_timer.h"
-#include "SDL_audio.h"
 #include "../SDL_audio_c.h"
 #include "SDL_jackaudio.h"
-#include "SDL_loadso.h"
 #include "../../thread/SDL_systhread.h"
 
 

src/audio/n3ds/SDL_n3dsaudio.c

@@ -22,13 +22,11 @@
 
 #ifdef SDL_AUDIO_DRIVER_N3DS
 
-#include "SDL_audio.h"
 
 /* N3DS Audio driver */
 
 #include "../SDL_sysaudio.h"
 #include "SDL_n3dsaudio.h"
-#include "SDL_timer.h"
 
 #define N3DSAUDIO_DRIVER_NAME "n3ds"
 

src/audio/netbsd/SDL_netbsdaudio.c

@@ -36,8 +36,6 @@
 #include <sys/types.h>
 #include <sys/audioio.h>
 
-#include "SDL_timer.h"
-#include "SDL_audio.h"
 #include "../../core/unix/SDL_poll.h"
 #include "../SDL_audio_c.h"
 #include "../SDL_audiodev_c.h"

src/audio/openslES/SDL_openslES.c

@@ -26,7 +26,6 @@
    https://googlesamples.github.io/android-audio-high-performance/guides/opensl_es.html
 */
 
-#include "SDL_audio.h"
 #include "../SDL_audio_c.h"
 #include "../../core/android/SDL_android.h"
 #include "SDL_openslES.h"

src/audio/pipewire/SDL_pipewire.c

@@ -20,12 +20,9 @@
 */
 
 #include "../../SDL_internal.h"
-#include "SDL_hints.h"
 
 #if SDL_AUDIO_DRIVER_PIPEWIRE
 
-#include "SDL_audio.h"
-#include "SDL_loadso.h"
 #include "SDL_pipewire.h"
 
 #include <pipewire/extensions/metadata.h>

src/audio/ps2/SDL_ps2audio.c

@@ -22,8 +22,6 @@
 
 /* Output audio to nowhere... */
 
-#include "SDL_timer.h"
-#include "SDL_audio.h"
 #include "../SDL_audio_c.h"
 #include "SDL_ps2audio.h"
 

src/audio/psp/SDL_pspaudio.c

@@ -27,9 +27,6 @@
 #include <stdlib.h>
 #include <malloc.h> /* memalign() */
 
-#include "SDL_audio.h"
-#include "SDL_error.h"
-#include "SDL_timer.h"
 #include "../SDL_audio_c.h"
 #include "../SDL_audiodev_c.h"
 #include "../SDL_sysaudio.h"

src/audio/pulseaudio/SDL_pulseaudio.c

@@ -26,7 +26,6 @@
    Stéphan Kochen: stephan .a.t. kochen.nl
 */
 #include "../../SDL_internal.h"
-#include "SDL_hints.h"
 
 #if SDL_AUDIO_DRIVER_PULSEAUDIO
 
@@ -39,11 +38,8 @@
 #include <sys/types.h>
 #include <pulse/pulseaudio.h>
 
-#include "SDL_timer.h"
-#include "SDL_audio.h"
 #include "../SDL_audio_c.h"
 #include "SDL_pulseaudio.h"
-#include "SDL_loadso.h"
 #include "../../thread/SDL_systhread.h"
 
 /* should we include monitors in the device list? Set at SDL_Init time */

src/audio/sndio/SDL_sndioaudio.c

@@ -36,12 +36,10 @@
 #include <poll.h>
 #include <unistd.h>
 
-#include "SDL_audio.h"
 #include "../SDL_audio_c.h"
 #include "SDL_sndioaudio.h"
 
 #ifdef SDL_AUDIO_DRIVER_SNDIO_DYNAMIC
-#include "SDL_loadso.h"
 #endif
 
 #ifndef INFTIM

src/audio/vita/SDL_vitaaudio.c

@@ -27,9 +27,6 @@
 #include <stdlib.h>
 #include <malloc.h> /* memalign() */
 
-#include "SDL_audio.h"
-#include "SDL_error.h"
-#include "SDL_timer.h"
 #include "../SDL_audio_c.h"
 #include "../SDL_audiodev_c.h"
 #include "../SDL_sysaudio.h"

src/audio/wasapi/SDL_wasapi.c

@@ -24,8 +24,6 @@
 
 #include "../../core/windows/SDL_windows.h"
 #include "../../core/windows/SDL_immdevice.h"
-#include "SDL_audio.h"
-#include "SDL_timer.h"
 #include "../SDL_audio_c.h"
 #include "../SDL_sysaudio.h"
 

src/audio/wasapi/SDL_wasapi_win32.c

@@ -30,8 +30,6 @@
 
 #include "../../core/windows/SDL_windows.h"
 #include "../../core/windows/SDL_immdevice.h"
-#include "SDL_audio.h"
-#include "SDL_timer.h"
 #include "../SDL_audio_c.h"
 #include "../SDL_sysaudio.h"
 

src/audio/wasapi/SDL_wasapi_winrt.cpp

@@ -36,8 +36,6 @@
 
 extern "C" {
 #include "../../core/windows/SDL_windows.h"
-#include "SDL_audio.h"
-#include "SDL_timer.h"
 #include "../SDL_audio_c.h"
 #include "../SDL_sysaudio.h"
 }