- Increase font size and decrease pixel size.
- The font is rendered at the same physical size, but is more detailed,
which is visible when the camera is up close.
- Add an outline to improve readability on mixed-color backgrounds.
- The outline is fairly thick to ensure it doesn't get too grainy
at a distance (without requiring MSDF or mipmaps on the default
project font).
Add "generate_mipmap" font import option.
Add some missing features to the Sprite3D.
Move BiDi override code from Control to TextServer.
Add functions to access TextServer font cache textures.
Add MSDF related flags and shader to the standard material.
Change standard material cache to use HashMap instead of Vector.
