Patch Notes: Tidier code

Behind the scenes

• The game's code and tests are now filed into folders by feature. Nothing in the game itself changes.
• If you are playing online when this update goes live, you are disconnected once and reconnect, as with any server update.

What's Changed

• TIDY: a code map, and the code, tests and records filed into folders by @Lattymoy in #948

Full Changelog: app-v0.1.8971...app-v0.1.9014