Ability to autogenerate bold / italic / bold italic font variants

[appgurueu]

Problem

Currently, our font engine expects separate font files for all four variants: regular, bold, italic, bold and italic for every style (currently just the mono and non-mono font).

This makes it harder to set up fonts and might be considered wasteful for media-provided fonts.

Solutions

Use FreeType outline processing API methods to autogenerate these: https://freetype.org/freetype2/docs/reference/ft2-outline_processing.html

Alternatives

Do nothing. This is not very high priority.

Additional context

A friend of mine inquired me about this