Enhance UX for game creation

[jporter-dev]

Make game creation more user-friendly for multiple users.

• Add an additional staging view to display some UI elements to help other users get connected.
• Staging room should show # of users (connected clients), as well as allow username entry
• Staging room will assign teams, assign spymasters, allow randomization, and show game creator
• Team assignment, spymaster assignment, etc will be adjustable mid-game or between games
• Also possible: staging room can allow for custom word entry. Custom words can either be merged in with the selected dictionary(ies), or played from independently.