[WIP] Separate & Upgradable Randomness

[smallbraingames]

• create a modular, namespace, randomness service
• use this randomness service to draw letters
• refactor code into two separate directories, one for the randomness service and the other for the game contracts
• this is due to mud not supporting multiple namespaces in the same project yet
• deploy both to the same world

Still some todos:

• fix other tests
• update frontend on an equivalent branch
• better tooling to easily test and deploy (currently takes 3-4 commands, need to run anvil, deploy the rng module, then deploy the game... this should be one command)