Add monospace font setting for textboxes in debug GUI

[Lyrth]

Description

Add a setting to make the font in some textboxes in the debugging GUI monospaced: GuiConsoleMonospaceTextEditors = 1; applied specifically to GUI console log, Watchers logs, Lua debugger text editors (Debug, Script Editor tabs) and REPL tab input and history.

(also arranged the fonts around a bit.)

Type of change

• New feature (non-breaking change which adds functionality)

How has this been tested?

GuiConsoleMonospaceTextEditors disabled: no change in behavior. Check screenshots below for when it's enabled.
Tested only on Linux but should behave the exact same on Windows.

Checklist

• I have commented my code, particularly in hard-to-understand areas.
• I have made corresponding changes to the documentation.
• I have added the necessary description of this PR to the changelog, and I have followed the same format as other entries.
• Any dependent changes have been merged and published in downstream modules.

Screenshots

GuiConsoleMonospaceTextEditors enabled screenshots:

Additional context

Also thought about making a separate setting to make it apply to the entire debug GUI, but I imagine it to be more tedious since there may be some alignment changes that need to be done in a lot of places, so this only covers the tall textboxes.

Default setting is disabled since it can technically be breaking, for mods that rely on non-monospaced text alignment in the console. But if that doesn't matter much we could have it enabled by default I guess.