Migrate Tessera doc to new Doctools

[NicolasMassart]

See https://github.com/ConsenSys/doc.tessera for doc source code.

To do

• [x] Create a github issue for migrating this doc (on the doc repos)
• [x] Exact site name: no change
• [x] Expected domain: https://consensys.net/docs/tessera/
• [x] Logo (SVG): no change
• [x] Colour palette: no change
• [x] Define content license: no change
• [x] integrate design elements (no change for now, migrating as is)
• [ ] Have agreement from the Tessera team
• [ ] Make sure all pending PRs are merged before starting
• [ ] Disable Github repos interaction for 1 week to make sure no collisions in PRs
• [ ] Disable Github webhooks with RTD and Circle CI
• [ ] Disable Circle CI build (in circle project config)
• [ ] Create a new main branch from master (next default will be main)
• [ ] Remove everything except /docs content and mkdocs.yml file
• [ ] Copy files from doctools.template except /docs
• [ ] Update mkdocs.*.yml files
• [ ] Update Docker compose file
• [ ] Preview the site locally
• [ ] Make adjustments (logo, favicon)
• [ ] Update Readme
• [ ] Create production and preview environments on Github
• [ ] Create production secrets (see doctools.template)
• [ ] Create the Cloudflare KV entry
• [ ] Push the main branch to upstream: the migration has to be on a branch in the upstream repos, not a fork!
• [ ] Create a first PR to activate workflows (add “fixes #” to close the initial issue automatically
• [ ] Setup branch rule for main and require workflow
• [ ] Setup @ConsenSys/consensys-docops team as admin on repo and keep @ConsenSys/protocol-pliny as maintainers
• [ ] Test the new doc site is published on new URL consensys.net/docs/tessera
• [ ] Setup main as default branch
• [ ] Create release for the latest stable version
• [ ] Update Cloudflare DNS CNAMEs
• [ ] Test the old doc site domain redirects to the new docs.tessera.consensys.net
• [ ] Restore Github interactions
• [ ] Communicate on the new doc site

ConsenSys product contact

team-tessera (PM @MadelineMurray )