Action to automatically create hack day discussion threads

[mfisher87]

We're currently making these manually:

#800

We should be able to set up their creation on a bi-weekly cron in GitHub Actions!

[Sherwin-14]

@mfisher87 Hey Matt, I would like to take this up. But before that I wanted to ask you what level of proficiency would be required in github actions for handling this one. I have none as of now (😂) but is it something that can be handled with little knowledge of actions?

[chuckwondo]

@Sherwin-14, before taking on anything else, would you mind either finishing the outstanding work on #792 or request that somebody else finishes it?

[mfisher87]

When you're ready, I think this is a reasonable first GitHub Action workflow for a learner :) It needs two pieces: A "cron" trigger, which uses the Linux cron syntax to define how frequently the workflow repeats; and a step which posts to our GitHub discussions something like this.