* Add const qualifier to char * path argument
in qoa_open()

* Remove unnecessary cast

The `qoaplay_open()` function expects a `char *`, but we are passing in a `const char *`. While this works just fine, it does issue a compiler warning when strict:

```
src/raudio.c: In function ‘LoadMusicStream’:
src/raudio.c:1290:45: warning: passing argument 1 of ‘qoaplay_open’ discards ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers]
 1290 |         qoaplay_desc *ctxQoa = qoaplay_open(fileName);
      |                                             ^~~~~~~~
In file included from src/raudio.c:233:
src/external/qoaplay.c:86:34: note: expected ‘char *’ but argument is of type ‘const char *’
   86 | qoaplay_desc *qoaplay_open(char *path)
      |                            ~~~~~~^~~~
```

This change casts the argument to a `char *` to fix the warning.

It was quite restrictive and hacky implementation, just load multiple types same sound to play multiple instances.

Some format tweaks

It shouldn't matter much but it could avoid some conflicts with other libraries in the future (like `tinyfiledialogs`).

* Use RL_QUADS/RL_TRIANGLES for single-pixel drawing

Addresses problem mentioned in
https://github.com/raysan5/raylib/issues/2744#issuecomment-1273568263
(in short: when drawing pixels using DrawPixel{,V} in camera mode,
upscaled pixel becomes a line instead of bigger pixel)

* [rtextures] Fixed scaling down in ImageTextEx

Closes #2755

* Added global audio processor

* Renamed struct member to follow naming conventions

* Added example for AttachAudioMixedProcessor

* Fixed some grammar mistakes.

* Fixed some typos.

Switch to official `stb_vorbis.c` instead of using an outdated fork

These IsReady() functions provide a method in order to verify whether or not the object was loaded successfully. They're useful to make sure the assets are there prior to using them.

Fix for #2714

GetMusicTimePlayed() was calculated using buffered frames, not played frames.
For example: calling LoadMusicStream->UpdateMusicStream->GetMusicTimePlayed would return non-zero value, even though no music was playing.

This PR fixes a bug when music.looping is set to false but the music continues looping.
Also using proper functions to seek to start of an audio file.
Removed old comment.

* WAVs looping fix. But broke other formats looping

* Fix audio looping issue

* Follow raylib formatting

* Cast void* to char* to make MSVC compiler happy

Co-authored-by: Ray <raysan5@gmail.com>

* Fix raymath warning with floor to floorf

* signed unsigned missmatches

Moved to raudio library repo: https://github.com/raysan5/raudio

Trying to implement proper looping, independently of frame rate.

* Comparison is always true because finalSample >= 1

* Comparison is always false because keyCount >= 0

This feature is still under consideration/testing and it doesn't work properly, at least the Delay Effect processor.

WARNING: This addition is based on a PR and it's still under review, not sure if it will be maintained in the future. In general, raylib tries to avoid callbacks usage mechanisms.