At this moment, physac is an external unmaintained library, better move out of raylib.

* Move rcore.h content inside rcore.c

* Remove extern CoreData CORE

* [Typo fixed]  in CHANGELOG

* [Typo fixed] in HISTORY.md

* Simplify POI selection

* Improve mouse logic

* Add colour cycles to the shader to show finer details. Works well with high iteration numbers

* Testing things...

* Actually fix zoom. Also allow user to reset camera with 'R'

* Reset max iterations

* Tidying & comments

* Revert to original if statement

* Make mouse logic more readable

* Style conventions

* Coding conventions - f postifx on floating points

* Missed a few f postfixes

temporary quickfix for issue #3473

Added new API to record and play events
Added examples illustrating functionality

This reverts commit 804f1a83eb.

closes https://github.com/raysan5/raylib/issues/3463

This reverts commit 8fbd42d592.

Additionally added a volume assignment from old to new as currently there is no way to get the volume of a sound and the AudioBuffer struct is not reachable from user code due to opaque definition.

rcore_desktop_sdl.c was not present in the list of prerequisites this
patch changes them to use a wildcard, so any other platforms added in
future will be tracked properly

ImageDrawCircleLinesV already existed, so I'm not sure why this was
missing. It is trivial to implement, anyway