Make the default font loader early out if we have already loaded parts of it, so we don't leak memory

I believe it makes sense to only do this when there are no known
touch points. I am not even sure if this should be done at all.

See https://github.com/raysan5/raylib/issues/4872 for more information.

Restore window currently says it sets the window state to:

   "not minimized/maximized"

However, if a window is maximized and then minimized, it's typical that
it would restore back to being maximized, which is what seems to happen
from my testing. I've reworded the description to better reflect
this behavior.

raylib app crashing when started and a gamepad is already connected to the PC (even if the gamepad is not used in the app). I only tested this with a gamepad that has a layout which is not recognized. Using SDL3 as backend.

InitWindow() prints CWD during initialization,
but ChangeDirectory() does not, which is quite confusing when you start
messing with CWD. Now said function should log similar message.

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

Prevents unnecessary work and division by zero (when segments=0) in DrawCircleSector/DrawCircleSectorLines when startAngle equals endAngle, matching existing behavior in DrawRing/DrawRingLines.

Undefine DEBUG to avoid external redefinition
warnings/conflicts.  This is probably a common
definition for many external build systems'
debug configurations.

This ensures raylib will not emit
a warning about the DEBUG definition being
redefined in external build systems.

* update RGFW to 1.6

* properly handle RGFW_quit events

* fix rcore_desktop_rgfw bugs

* update

* update

* uncomment out

* [rcore] fix crash in InitWindow, due to unchecked result of InitPlatform

Check the result of InitPlatform(), if it isn't 0, report the Error
and return. This prevent crashes and allows for gracefully aborting
or recovering by checking IsWindowReady().

Partially-fixes: https://github.com/raysan5/raylib/issues/4801

* [rcore] style: store the result of InitPlatform() before checking it

Small style change that doesn't impact how the code behaves here.
Variable 'result' is not used anywhere else in this block,
it's just for compliance with Raylib's coding conventions.

Requested in PR: https://github.com/raysan5/raylib/pull/4803#discussion_r1976502788

* [rcore] use LOG_WARNING when InitPlatform() fails

...as this is preferred over LOG_ERROR.

Requested-by: https://github.com/raysan5/raylib/pull/4803#discussion_r1976651724