Move marketing page to own private repo, and add redirect to webapp

[linear[bot]]

using nextjs: https://nextjs.org/docs/pages/building-your-application/deploying/multi-zones

We should separate the Marketing (landing page) and the app
this will require moving some pages and APIs to their respective areas such as Login
and creation of new functions to handle things like the Login/Dashboard button on the landing page

Why?

This will simplify self hosting, reduce bundle size, and make self hosting deployments not show our marketing pages which impact SEO and could be easy for a copycat to use