Updated README-platforms.md

Also added platform specific README files

docs/README.md

@@ -7,8 +7,7 @@ to provide low level access to audio, keyboard, mouse, joystick, and graphics
 hardware. It is used by video playback software, emulators, and popular games
 including Valve's award winning catalog and many Humble Bundle games.
 
-SDL officially supports Windows, macOS, Linux, iOS, and Android.
-Support for other platforms may be found in the source code.
+SDL officially supports Windows, macOS, Linux, iOS, Android, Xbox, PlayStation 4/5, Nintendo Switch, and many other platforms.
 
 SDL is written in C, works natively with C++, and there are bindings 
 available for several other languages, including C# and Python.
@@ -24,28 +23,13 @@ The header files and test programs are well commented and always up to date.
 
 Information on reporting bugs and contributing is available in [README-contributing.md](README-contributing.md)
 
-More documentation and FAQs are available online at [the wiki](http://wiki.libsdl.org/)
+More documentation and FAQs are available online at the [wiki](http://wiki.libsdl.org/)
 
 - [Migrating from SDL 2.0](README-migration.md)
-- [Supported Platforms](README-platforms.md)
 - [main()](README-main-functions.md)
 - [High DPI Support](README-highdpi.md)
 - [Touch](README-touch.md)
-- [Versions](README-versions.md)
-
-- [Android](README-android.md)
-- [Emscripten](README-emscripten.md)
-- [iOS](README-ios.md)
-- [KMSDRM support on BSD](README-kmsbsd.md)
-- [Linux](README-linux.md)
-- [macOS](README-macos.md)
-- [Nintendo 3DS](README-n3ds.md)
-- [PS2](README-ps2.md)
-- [PSP](README-psp.md)
-- [PSVita](README-vita.md)
-- [RISC OS](README-riscos.md)
-- [Windows GDK](README-gdk.md)
-- [Windows](README-windows.md)
+- [Supported platforms](README-platforms.md)
 - [Porting information](README-porting.md)
 
 If you need help with the library, or just want to discuss SDL related