feat: allow users to select main font for latin chars

[xiaohanyu]

Description

We would like to provide options for users to customize the main font for latin chars in LaTeX.

The number of free CJK fonts is very limited, so let's implement this for latin chars first.

[Optional] Possible solutions

NA

Acceptance Criteria

• user should be able to customize typography

Todo list

- [ ] spike: decide a list of fonts to support