Web layer for zzva, zzva-web

Layer added to support exposing endpoints exposed via actix-web

Support extensible cli game-play

Functional game-play on command line with support for extensibility and logging.

Changes:

• Add game engine
• Add unit and integration tests
• Ergonomic support for cli params
• Polished library for extensible gam-eplay
• Logging for game-play events