Update for SDL3 coding style (#6717)

I updated .clang-format and ran clang-format 14 over the src and test directories to standardize the code base.

In general I let clang-format have it's way, and added markup to prevent formatting of code that would break or be completely unreadable if formatted.

The script I ran for the src directory is added as build-scripts/clang-format-src.sh

This fixes:
#6592
#6593
#6594

test/testver.c

@@ -15,8 +15,7 @@
 */
 #include <SDL3/SDL.h>
 
-int
-main(int argc, char *argv[])
+int main(int argc, char *argv[])
 {
     SDL_version compiled;
     SDL_version linked;
@@ -31,12 +30,12 @@ main(int argc, char *argv[])
 #endif
     SDL_VERSION(&compiled);
     SDL_Log("Compiled version: %d.%d.%d (%s)\n",
-           compiled.major, compiled.minor, compiled.patch,
-           SDL_REVISION);
+            compiled.major, compiled.minor, compiled.patch,
+            SDL_REVISION);
     SDL_GetVersion(&linked);
     SDL_Log("Linked version: %d.%d.%d (%s)\n",
-           linked.major, linked.minor, linked.patch,
-           SDL_GetRevision());
+            linked.major, linked.minor, linked.patch,
+            SDL_GetRevision());
     SDL_Quit();
     return 0;
 }