Support for dynamically generated config

[JustSimplyKyle]

Is your feature request related to a problem? Please describe. Not currently, but this can be beneficial to complicated scripting.

Describe the solution you'd like https://elkowar.github.io/eww/configuration.html#dynamically-generated-widgets-with-literal Or the return_type of https://github.com/Alexays/Waybar/wiki/Module:-Custom basically, just a type of a module that supports generating entire "literal' widgets from scripts.

Additional context The existence of multiple config formats could be an issue. Since passing thru yaml configs aren't exactly easy if we follow the same as waybar and eww.