Slack support and open source puzzle inventory

[AliOsm]

Hello team, I hope you are doing well. Thanks for this great project! Are you planning to support Slack? As we are not using Discord. Also, is the puzzles inventory open-source anywhere? Thanks!

[etagwerker]

@AliOsm Thanks for your issue! We are definitely open to supporting Slack. I hadn't thought about open sourcing the puzzle inventory, but I like that idea too. .cc @arielj @JuanVqz