feat: Better customization for starting a new game lobby

[sudojunior]

Intended options

• [ ] is_private as checkbox: Whether or not the lobby should be private^*1

  Unknown how this will work with Discord's modal system, but it will be intended as a checkbox / boolean value.

• [ ] color? as selector: The embed color of the lobby prompt

  This would be used for all messages sent on behalf of the lobby host, including the lobby prompt - as it does already with randomizing the initial color, and repeating it's use with game.color across the board.

• [x] name as text input: The name of the lobby

  Modal field and limit already implemented.

^*1: private is defined as a lobby players can request to join, but only the host can accept their invites.

As it does from its hardcoded configuration.

[sudojunior]

For the purpose of testing, use of yet more randomizers is a viable option rather than handling the arbitrary nature of registering multiple (and possibility null) modals, as well as the considerations for API ratelimits; select option limits; character limits and physical code logic to achieve all of it.

• name rename the game channel to a random alphabet paring

  primary concern: channel renaming ratelimits

• color random hex color (or random color from predetermined selection, more likely - but requires selecting colors first)

  primary concern: color pool

• is_private easy toggle, but harder to establish the emoji to choose if the list is being mapped into another structure (i.e. key-value to an array of select options)

  primary concern: emoji choice condition