Support changing Rules on the fly

[sellnat77]

Backend

• Backend needs to support a POST to /game/rules with a payload of ```{ "game_id":"", "rule_key":"", "new_rule":"" }````
• The POST will update the db entry for the corresponding game and the corresponding rule
• Backend is also responsible for notifying front end clients (socket event?)

Frontend

• Rule panel needs to retrieve the listing on game join
• Rule panel needs to display the rules in a more pleasing manner
• Rule panel will have some indicator that the rule consequence is edittable (button maybe for mvp)
• Rule consequence will become a prepopulated <input /> that the user can edit
• OnSubmit, the new rule is POSTed to the backed in the above format
  • Frontend and all other frontend clients need to be responsive to the new change, most likely listen for a socket event