Add 1-Click install links for each MCP server

Rather than having to navigate through individual repos, it would be super helpful to have install links for VS Code (stable & insiders) and other hosts we want to promote.

Like this:

<img width="848" alt="Image" src="https://github.com/user-attachments/assets/dd981e52-d9be-4d80-a4e0-766586c1e8d3" />