Add "9:30 Club Upcoming Shows"

[PeytonCS]

Adds a new app "9:30 Club Upcoming Shows" that displays upcoming concerts at the 9:30 Club in Washington, DC. Contains marquee scrolling for the band's name, and a badge to indicate if the show is sold out.

[tidbyt]

⚠️ The automated review process is experimental and likely has bugs. Please bear with us as we iron out the kinks and enable you to ship changes at high velocity 🚀

Next Steps

Hello! Thank you so much for your change 🤜 🤛 . There are a few things you need to do:

• Sign the CLA if you haven't already
• Ensure your build is green! Any problem will display a proposed solution to try out
• Get a review, either by Tidbyt Bot or by a Tidbyt engineer

Manual Review Required

Hang tight! A Tidbyt engineer will be by shortly to review your change. Here is what they will be looking for:

	Test	Details
✅	App Dir	All files are in a single app directory
🟡	Modules	Multiple .star files: apps/up_next_show/app.star, apps/up_next_show/metadata.star
✅	Original Author	The original author matches the PR author

[tidbyt-bot]

CLA Assistant Lite bot All contributors have signed the CLA ✍️ ✅

[PeytonCS]

I have read the CLA Document and I hereby sign the CLA

[drudge]

You have some linting issues that need to be addressed before this can be merged.