Adds `/blog` page with support for `.md` and `.mdx` files.
What we learnt in setting this up will be packages in a package `@nestri/mdx` and used to set up the `/docs` and the `/terms` and `/privacy` routes
This adds the following pages:
The landing page (/)
The pricing page (/pricing)
The contact page (/contact)
The changelog page (/changelog)
Terms Of Service page (/terms)
Privacy Policy (/privacy)