[Enhancement]: Custom themes (maybe theme.park support?)

[kstlouis]

Describe the feature/enhancement

I saw in Discussions that there was some talk about customizing the UI - namely, a light theme and the option for changing the wood grain (which was removed for lack of interest).

Curious to see how difficult it would be to implement the ability for services like theme.park to apply skins/themes to ABS. I would love to be able to give ABS the same theme as all of my other containers. Would explicitly allowing this kind of integration be easier than making/maintaining custom themes in-house?

Apologies if this is seen as a dupe since it's been discussed already, but I figured it warranted a separate inquiry since it seemed different enough from previous suggestions.

[stom66]

I too would like to be able to customise my AudioBookShelf instance with my preferred colour-scheme.