Pixel perfect display support for pixelated fonts

[Roxfall]

load_ttf_font_from_bytes function should have a variant that exposes Nearest filtering and the default glyph size (15 is not always the best) to give user more control over blurring and other distortions.

Either that or make get_context public, which is probably not ideal for good reasons I don't understand yet.

Thank you for your time and patience.

[kotx]

@not-fl3 ~~Can we have a load_ttf_font_from_bytes_ex function that exposes FilterMode (or maybe some other parameters)? Would be willing to contribute.~~

Edit: Nevermind, I just found out Font has a set_filter method defined for it.