Previously stated it was the near plane width in orthographic, in actuality it's the height. The wording has been fixed, with added clarity that it's in world units so no conversion is needed.

* win32 backend

* [rcore][win32] use SwapBuffers instead of wglSwapLayerBuffers

I don't understand OpenGL well enough to know the difference between
SwapBuffers and wglSwapLayerBuffers but the former seems to double
my FPS (from 2000 to about 4000 in core_vr_simulator).

* [rcore][win32] stop lying to the OS about when our window is updated

Instead of calling BeginPaint/EndPaint in WM_PAINT which signals to the
OS that our window content is updated, now when we encounter the WM_PAINT
message instead we return back to the raylib application which will
trigger it to render a new frame. We've replaced the call to BeginPaint
and EndPaint with a call to ValidateRect in SwapBuffers, which, means
we're now correctly telling the OS when our window content is actually
up-to-date.

Note that this doesn't fix the window content not being updated during
a window resize/move beacuse thos have their own message loop which
doesn't return early when it's time to paint.

* [rcore][win32] fallback to finding functions from opengl32.dll

* [rcore][win32] fixes from review/for gcc

* [rcore][win32] incorporate style conventions

* [rcore][win32] workaround unused function error SetupFramebuffer

* [rcore][win32] re-enable sanitize flags check for MSAA_4X

* [rcore][win32] more style changes and remove old DPI cases

Added some more missing spaces after conditional statements.  Also
made unsupported MSAA_4X an assert instead of an abort and also
removed dpi-aware cases for older OS's.  More changes would be needed
to support those OS versions, namely, removing the dependency
on shcore.

* [rcore][win32] fixes for compling with w64devkit without -DUNICODE

* Update build.zig

* Update build.zig

---------

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

Co-authored-by: Philipp Maierhoefer <particle@maierhoefer.net>

Fix  raysan5/raylib#5131.

Adds more filters for conditional build of GetWindowHandle with glfw

This reverts commit bab234a1604a9d23538594bd3894bf13574612df, reversing
changes made to 13e384ce71.

There was a typo in the generated keycode.

hope this gets merged