feat: font size increase/decrease in non-monaco panels

[jimniels]

In #1096 we supported CMD +/- for increasing/decreasing font size in the editor. This, however, only controls text inside the Monaco editor. It doesn't affect UI elements that are not in the editor, such as text placeholder for the editor

Or for code editor related panels, like the console or the AI assistant.

When you increase the font-size of the code editor, it only affects stuff that is rendered directly by Monaco.