Theme reloading

### Description

Hi,

First, thank you for the awesome app. I searched a long time for a good alternative to trello and more with linux/windows compatibility, customization, etc.

I am a linux user, and I have various scripts which generate dotfiles and config files every time I change my wallpaper, so all my application themes follow the color of my wallpaper.
I managed to dynamically generate custom theme files for appflowy as well. But there is a minor issue : appflowy does not refresh the theme even after the files have been regenerated by the scripts when changing wpp. I tried to clear the cache but it does not change anything. So I have to re-import the theme every time.

Is there a way to quickly reload the theme. Or would it be possible to add a reload theme button / reload the theme at start ?

Thank you again

### Impact

Advanced users
Users who seek maximum customization

### Additional Context

_No response_