I'm sorry... I did not detect this change was breaking batching... :(

* Fix textures on draw mode switch

* formatting fix

* ident

This optimization works in the following ways:

1. Reduces calls to malloc to 1. Instead of needing an extra array, we
can just swap the top half with the bottom half of the one array.

2. Unroll the inner for loop and remove a condition. Unrolling loops
buys some performance wins, but the real goal was to remove the if check
and just set the alpha channel to 255.

On my hidpi arm64 laptop, I saw ~60% improvement in performance in my
debug build (29 FPS vs 47 FPS). When optimized, the gains were roughly
10% (75 FPS vs 83%).

Signed-off-by: K. Adam Christensen <pope@shifteleven.com>

"renderer" to "rendered"

* [rlgl] Load cubemap mipmaps

* [rtextures] Only generate mipmaps that don't already exist

* [rtextures] ImageDraw(): Implement drawing to mipmaps

* [rtextures] Load cubemap mipmaps

* Fix rlgl standalone defaults

* Fix rmodels

* Make the max VBO match the animation flag.

* re-enable GPU skinning for mac, and fix the max buffer to be correct based on the GPU skinning support flag.

* Update raylib_api.* by CI

* Disable GPU skinning on MacOS
Add GPU skinning example to MSVC Projects.

* Update raylib_api.* by CI

---------

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

* Added optional GPU skinning

* Added skinned bone matrices support for different file formats.

* Moved new shader locations to end of enum to avoid breaking existing examples. Added gpu skinning on drawing of instanced meshes.

* Added GPU skinning example.

* Removed variable declaration to avoid shadowing warning.

Compilation breaks on rlgl.h for early OpenGL versions.
Glint64 did not exist on those versions (< OpenGL 3.2)