[FEATURE] Pilot/Mech Mount and Dismount Macros

[Eranziel]

Implement support for separate pilot and mech images and tokens for each Pilot.

Need a good UX for selecting which token to place. Mech token should be default. Possibly have a draggable token-generator on the pilot/mech sections of the sheet?

Add a HUD button for dismounting/mounting on the canvas. Dismounting will generate the pilot token on top of the mech token. Mounting should only be an option when adjacent to that pilot's mech, and will remove the pilot token from the canvas.

[Grygon]

Now somewhat supported, but I think the other enhancements you mention would be neat to add, so leaving up

[Grygon]

Moving this to v1.1 for those bonus things