website: New Graphile* website for Graphile Utilities & Tools for GraphQL

[jemgillam]

WIP

Docusaurus website for star.graphile.org

Contains migrated docs for:

• Graphile Config
• Graphile Export
• pg-introspection
• pg-sql2
• tamedevil

Current colour scheme, likely to be adjusted - perhaps I would prefer one of the blues to be the primary colour:

[jemgillam]

I did not like red being the primary colour for links and things. Perhaps the build website would work with that. As this is called "Graphile Star" (Graphile-wildcard) I went for an astronomy theme. Looks alright even in dark mode too. I think this is ready to be deployed and left alone for a while now.

[jemgillam]