chore: exclude ddev-related directories
This change adds some git-ignore entries for files generates by ddev / ddev-drupal-contrib, to allow for easier development.
To set this up:
- clone the repo and check out this branch
- follow the isntall instructions at https://github.com/ddev/ddev-drupal-contrib?tab=readme-ov-file#install
You should see all of these files get ignored, so we don't need to worry about any non-project files getting accidentally staged/committed.