Add Tuitar

[orhun]

Hey!

I have recently released Tuitar and wanted to include it in the newsletter.

Some points:

• Not sure if you accept release links or repo links directly, but that's all I have for now. Hopefully it's fine!
• There is also a demo video or conference talk if you prefer those instead (or both link + video).

This is the first embedded @ratatui DIY kit so I'm excited to share it with people!