Implement Window Adjacency Connections

[cosmiccoincidence]

Summary

Basically we have some complex connections for walls/windows/etc. and instead of modeling specific wall-window transitions as a whole piece, we have done so as a separate piece (called Window Dividers) that overlays that gap.

Implement a new tilemap adjacency connection script (similar to the others) for "window connections". This should follow their design located here.

This will allow for windows to be added to the map via the editor and perform intended connections.

The dividers should be a component on the window prefabs, and based on the shape of the window and its connections it may require multiple dividers.

Window Connections

Model Guide

Context

Another connection script as example: https://github.com/RE-SS3D/SS3D/blob/master/Assets/Engine/Tile/TileRework/Connections/AdjacencyTypes/AdvancedAdjacency.cs

[Em3rgencyLT]

This depends on #865