Custom modules

[confusinguser]

Inspired by waybar. Let the user input a command that is run every x seconds which outputs something in some range.
This can have multiple modes:

• Color: Changes the color depending on output
• Progress: A progress bar
• json: Gives a Json Object with all the data needed. Can even control each light individually

Also, something like what waybar does with the commands which don't exit and allow lower update latencies with a restart-interval