Add title, lobby, class select, game, shop, and result screens.
Rewrite model.go with 6-screen state machine and input routing.
Wire server/ssh.go and main.go with lobby and store.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Sets up Go module, Wish/BubbleTea SSH server on port 2222, placeholder
TUI model showing "Welcome to Catacombs!", Dockerfile, and docker-compose.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
