[FEAT]: Add smart gaps

[AntDavidLima]

It's nice to have window's gaps when multiple windows are open, but when only one window is open, I think it is a waste of usable space.

It would be nice to have the option to disable the window's gaps when there is only one window open

[urob]

This might not be exactly the same, but you can get pretty close to what you want by setting the workspace-padding to the negative of the container-padding. E.g., if you are using a static configuration file, you can add something like this

  "default_workspace_padding": -10,
  "default_container_padding": 10,

[LGUG2Z]

For this I recommend toggle-maximize; I don't think we are going to add another configuration option to maintain for something like this.