Release 1.9.2

Fixed:
- launch-intranet.sh failed on fresh clones with 'no .ddev/config.yaml
  file was found': tracked .ddev/ command files made the launcher skip
  ddev config (#3592737). DDEV command sources now live in ddev_commands/
  and .ddev/ is no longer tracked; the launcher checks for config.yaml
  instead of the directory.

Workaround for 1.9.1 checkouts hitting the error:
  rm -rf .ddev && ./launch-intranet.sh