Move DevFAQ into a monorepo

[typeofweb]

Why

In order to make project management easier, we need to merge both repositories (this one and https://github.com/typeofweb/devfaq-api) into a single monorepo.

Other benefits

This will also vastly simplify some pieces of the codebase:

• Top level shared eslint config (+ overrides in api and www)
• Topl level prettierrc
• Single "dev" command to start both parts of the app
• Easier to introduce changes which usually span across both api and frontend

Checklist

• use this repo as a base
• make sure it's clear in devfaq-api readme that the code was moved here
• use yarn workspaces and maybe lerna
• merge api and www GitHub Actions workflows into a single workflow with two parallel jobs
• make sure commands such as dev and test can be run from the top level

[typeofweb]

Blocked by #87