Download Projects as a Zip

This is a proof of concept, showing how to download Val Town projects as zip files. For now, I've hardcoded my username into the code, so you can only download my public/unlisted projects. To see it working, type the name of this project getProjectsAsZips and press download. Waalaah!

If you fork this project, you can update the hardcoded username in frontend/MessageInput.tsx. I forked the reactHonoStarter to get started quickly (it's great), hence the weird naming and leftover code you'll see around this project.

I'd love it if someone wanted to send me a PR and tackle either of these two:

1. Add ability for users to input their own username
2. Add ability for users to input their API token so they can see private projects