Host a race - Githubissues

This closes #1

Features applied:

Host a race (doesn't start)
Enable and save (dont-fill, only-one, no-bets) flags into the race state
Notify the user that they have hosted using ephemeral
Create a Race state which renders and re-renders (edits) an single message
Join the race via Discord Button UI (not cmd yet) this will update the race message with the extra entrant
Log errors, and notify to the user ephemerally that there was an issue
Notify the user if they are already in the race

lcox74 / snailrace