Switch Local Development infrastructure to Lando

[jlandfried]

There was some preliminary work done for this in #67 and #101, but there have been some changes on the Lando end, and we are shifting gears to adopt it as the sole local development infrastructure for the scaffold going forward, and a new issue helps reflect that.

Work for this is being done on the lando branch. There is a TODO.md file that outlines work still to be done, but for tracking purposes here are the pieces that I think are still remaining.

TODO

• BLACKFIRE: Enable Blackfire in Lando (see this issue and this gist)
  • Update Blackfire docs in docs/tools/blackfire.md
• WDIO:
  • Disable, remove WDIO configuration
  • Documentation at docs/tools/wdio.md
• MANNEQUIN:
  • Add mannequin service to Lando config
  • Update Mannequin docs at docs/tools/mannequin.md
• VARNISH:
  • Determine if we still want a varnish service
  • If yes:
    • add varnish service to .lando.yml
  • If no:
    • Remove docker/default.vcl, docs in docs/tools/varnish.md
• DOCKER-COMPOSE: Since we're switching from docker-compose to lando it would be confusing to leave the docker-compose functionality in here, documented or not. We should remove config and references to the old docker-compose local infrastructure
  • Remove docker-compose.yml
  • Remove docker directory
• LOCAL DEVELOPMENT TOOLS:
  • Determine if we need the site-import tooling in appserver
  • If yes:
    • Add terminus commands and scripts for importing a database
    • Add acquia API commands for importing databases