`npm run install` in the first place is not a valid command, `yarn run install` will also be fixed by this change as we are using **npm-to-yarn** package for its conversion (tested).
`yarn run start` is a valid command, i know `yarn start` is a **short-hand** but i cant help here as we have't hardcoded it in the docs its being converted through the same package mentioned above, anyways both are valid so should be fine ig.
- Add a new homepage to `book` project for the routing page
- Move all main doc pages to be under `/v2/learn` (and added redirects + fixed links across docs)
- Other: add admin components to resources dropdown + fixes to search on mobile.
Closes DX-955
Preview: https://docs-v2-git-docs-router-page-medusajs.vercel.app/v2
