Configurable font size for the secondary side bar

[seeM]

Users should be able to configure the font size in the Variables, Plots, Help, Viewer, and Connections panes.

Using ctrl+ to zoom in the entire interface to a level where I can comfortably read the text in the secondary side bar increases the sizes of other elements of the window to a point where I lose too much screen space, so this is not a solution.

I can find settings to adjust the font in the editor but nothing for anything in the secondary sidepanel. Is there there an extension i can use or a css file or something I can change to just increase the font size there?

Originally posted by @addaboi in https://github.com/posit-dev/positron/discussions/4312