[Feature]: Add unit type to map

[Tdue21]

Feature Request

This is mostly a matter of convenience more than anything. But if it was possible to set the unit type for a map, it would be awesome. Most battlemaps will have a unit type of feet (or meters) depending on the system. But some maps, province or kingdom maps will typically have a unit type of miles or kilometers.

This would make it possible to make generic macros for e.g. distance measuring in more than "cells" or "pixels".

The Solution you'd like

This mock-up will explain what I mean:

But basically, add a new property to maps which defines the unit type used for that particular map. This will default to ft. as that is what is most common, I think.

Alternatives that you've considered.

The only alternative I can think of is added a special token type, e.g. called Maps. This would then have the unit type and any other properties not found in MapTool. This would require a convention for how this particular token is determined though.

Additional Context

No response