feat: support text size resizing in code editor

[jimniels]

When you're focused on the code editor today, hitting CMD + + or CMD + - zooms the grid, not the text size of the font in the code editor.

Should probably allow folks to bump up the font size to a size that fits their needs.

[davidkircos]

Yeah it's only possible to do right now through the fn + f1 code editor Command Palette

[luke-quadratic]

Should we make this more obvious? I forget 100% of the time how to perform this action.

[jimniels]

The hotkeys for this CMD + and CMD - were implemented in #1096