Implement Directional Adjacency Connections

[cosmiccoincidence]

Summary

Implement a new tilemap adjacency connection script (similar to the others) for "directional connections". This should follow the design located in the link below.

Goal

This will allow for modular seats and similar connectables to be added to the map via the editor and perform intended connections.

https://docs.google.com/document/d/1ful7_gIJo7e74i9LMQuYMpjZMH2V1aT90mwlrQ0hcgE/#heading=h.w1e4ju9ibvx6

[Em3rgencyLT]

Depends on #865