add builtin actions

[taj-ny]

This adds the ability to create hard-coded actions, which can then be easily configured and assigned to a gesture.

More actions and configuration will be added.

touchpad:
  gestures:
    - type: swipe
      fingers: 3
      direction: up
      
      builtin:
        id: maximize
        instant: true
        
    - type: swipe
      fingers: 4
      direction: any
      
      builtin:
        id: drag_window

[taj-ny]

Proof of concept window maximization gesture:

2025-02-05.18-54-38.mp4

The gesture is cancelled if the minimum delta (not threshold) isn't reached and fingers are lifted, otherwise the gesture ends.

Right now it just resizes the window, but proper smooth animation will be added (if possible).

[taj-ny]

First proper 1-to-1 gesture: close window

2025-02-06.18-56-59.mp4

Is that how it's supposed to work? I've never used those before.