keiyoushi/extensions ? reverse-engineered prompt

Build me a simple public website for an extensions repo like this one for Mihon and similar apps.

It should have a clean landing page that explains what the repo is, shows how to add it, and makes it easy to copy the repo link. I want a browsing page where people can see the available extensions, open details for each one, and download or add the repo if they need to. Please include the basic repo info, a place for the icon, and a simple JSON or manifest style data file behind the scenes so the extension list can be updated easily.

Keep it lightweight, mobile friendly, and easy to maintain. Make sure the instructions are clear for someone who is new to adding extension repos. If anything about the current setup is unclear, look up the current docs online if you need to.