Option for setting 3 default fonts for Serif, Sans-serif and Monospace

I've read Koodo Reader's roadmap, there is no similar feature.

• Yes

This issue only requests one feature.

• Yes

Brief Introduction

Hello, great app there! Coming from Calibre, one feature I miss is setting a default font for each one of the major font types. With the way things are right now, if you select a default font the entire text will be displayed in that font.

Example use case: Reading a programming book that contains code snippets that had been set to be displayed in monospace, while the rest of the text in non-monospaced fonts.

Details

How the feature could look like in the settings: (screenshot from Calibre)