Enable ghost wraparound, take 2

[nucleartide]

User Story

• Update A* algorithm so that wraparound nodes have edges to nodes at the opposite end of map
• Update ghost AI movement so that ghosts wrap around when exceeding level bounds

test.mov

Dev checklist

• First draft. Implement a working first pass at the feature.
• First playtest. Thoroughly playtest until you are confident that the feature (and existing features) work.
• Final draft. Perform a general review of Files changed and revise anything that needs to be cleaned up.
• Final playtest. After the changes above, playtest through the game one last time to ensure that everything works.
• Fill out the pull request template. Self-explanatory.
• Remember the GIFs. Include a recording of what's going on!
• Merge. Merge into master.

Release checklist

• Build. Cut a new build in Unreal. If the game doesn't build, fix until it does.
• Tag. Once built, tag the latest commit on master with the latest version string.
• Upload. Upload build to Google Drive.
• Priorities. Prioritize items on work board.
• Next task. Tee up a pull request for the next feature.