Zoning UI cleanup 2

[PeenScreeker]

Closes:
momentum-mod/game/issues/2122
momentum-mod/game/issues/2225

This PR changes the UX around point placement while zoning and updates the UI accordingly. The region menu has been updated to remove tabs for points, properties, and teleport.

• Edit points in world space
• Click a corner to reposition it
• Click an edge midpoint to insert a corner
• Press backspace or delete to remove the last corner
• Change corner mode with middle click
• Creating zones now requires fewer clicks

Checks

• I have thoroughly tested all of the code I have modified/added/removed to ensure something else did not break
• I have followed semantic commit messages e.g. feat: Add foo, chore: Update bar, etc...
• My branch has a clear history of changes that can be easy to follow when being reviewed commit-by-commit
• My branch is functionally complete; the only changes to be done will be those potentially requested in code review
• All changes requested in review have been fixuped into my original commits.
• Fully tokenized all my strings (no hardcoded English strings!!) and supplied bulk JSON strings below

[tsa96]

I know this is still a draft but figured I'd have a quick skim over this. If you're having issues with null/undefined stuff I'd be happy to go over best practices more, they can be a real bastard to work with.

Could also enable TS strict mode specifically for this file, which will yell at you like crazy at first, but once you fix all the strict null check issues it can make getting null-checking
right much easier.

[Panzerhandschuh]

You should reduce the right padding on the TextEntry's. I think the css class is zoning__textentry.

[Panzerhandschuh]

I haven't reviewed all of the code but this looks fine in game.