* ui(raylib): reduce spinner rotation artifact
A visual artifact (white pixels) appeared on the edge of the
rotating spinner track texture, likely due to RGB color bleed during
bilinear filtering in Raylib.
Pre-multiplying the alpha channel of the spinner track image using
`rl.image_alpha_premultiply` significantly reduces the visibility of the
artifact.
* lint
* pyray init version
* remove c++ code
* cleanup
* restruct the directory layout
* improve GuiApplication
* smooth out the texture after resize
* use atexit to close app
* rename FontSize->FontWeight
* make files executable
* use Inter Regular for FrontWeight.NORMAL
* set FLAG_VSYNC_HINT to avoid tearing while scrolling
* smoother scrolling
* mange textures in gui_app
Cameron Clough
Dean Lee