[New Feature] Tileset Restrictions

[CatTanker]

Description:
Allow specific tilesets to block movements of specified units.
Examples: Indoor Tiles block movement of aircraft above the tile, Water Tile cannot have a specific amphibious unit enter the tileset.
INI Code:
;rulesmd
[SOMEUNIT]
TileBlockx=yes/no (def no)

;terrain file
[TileSetxxxx]
TileRestriction=yes/no (def no)
Tileset.Block=TileBlockx

This will allow greater control over tilesets and cause certain features to be implemented reasonably
The ability to block aircraft passing a cell is the main priority of this suggestion.

This feature may be better implemented on individual tiles, but tilesets will suffice.

Example of where it would be useful is included below.
https://user-images.githubusercontent.com/81521710/117548104-e9a5bc00-b02a-11eb-9e5e-fff13ecd8c16.mp4

REGARDING PATHFIINDING OF AIRCRAFT:
They should still fly over buildings, ect as normal but should not be able to pass any blocked terrain, and will either not enter the cell or will find an alternative route. Upon clicking an aircraft to go over a blocked cell, it should act similarly to a tank being told to go onto water-going near it but not over it