[docs] Reset themes documentation

[rogeruiz]

1. 💬 Create the first draft for resetting theme 🏷️ b4c3472

Important

More updates coming soon as progress is made. Watch this space for updates
soon.

This work is based on the work in #500. Until that PR is merged,
this patch will remain a draft.

[kjnsn]

Wow thanks so much for writing all this up! It's awesome!

I don't think that the tmux change to use CSI 2031 (where the terminal reports a light/dark mode change) is required for users to benefit from the reset option. I'd also be really happy to get some more docs that explain how options work in a way that is immediately relevant for us.

So I would like to merge this into a feature branch where we can collaborate on this in smaller chunks, and also give others the opportunity to work on the draft docs. Once we're happy enough we can merge into main.

Separately, I'll create a draft PR that adds documentation regarding tmux's light/dark theme hooks. That can be merged when tmux creates a new release.

[rogeruiz]

🎉 yay! Thanks. I agree on the feature branch work. The docs we have so far are great. Happy to add to it.