[examples] Add screenshot for core_basic_window_web

The veritable screenshot is this

[rcore][web] Add `EmscriptenKeyboardCallback()` to consume key events

There are no screenshot for this and the alt is seen

[glfw] Update `mappings.h`

[examples] typo: hardcoded gamepad ids in `core_input_gamepad.c`

[rcore][drm] Replace DRM swap buffer implementation with asynchronous page-flipping and triple framebuffer caching

[rlgl] Add rlGetProcAddress

Fixed: CMake support for SDL3

[rl_gputex] fix: decouple logging and memory allocation from Raylib

Added CMake support for SDL3.
Now supports including SDL2 or SDL3 as a subdirectory within the project. The system will first check for SDL3, then SDL2. If neither is found, it will attempt find_package(SDL3), followed by find_package(SDL2). If all these checks fail, the process will terminate with an error.

[build][zig] use `addLibrary()` and set root modules manually

These changes will be required by Zig version 0.15.0.

[examples]: New example: `shapes_double_pendulum`

[rcore][linux] Fixes GetWindowHandle returning a bad handle under Linux X11

[build] Update Makefile

Remove .bc file removal from clean shell for windows configuration.

Update font load message

[example][web] Fix core_custom_frame_control.c to properly register inputs on web platform