What Are the Odds

This is an implementation of the What Are the Odds? Game as a Fabric server-side mod.
An informal description of the games rules can be found here:
https://what-are-the-odds.info/

Usage

Challenge a player to a game with:

/odds challenge <player name> <text of the odds>

The other player can respond with

/odds respond <number>

Then both players write their guesses in the chat and the mod checks it.