Let ddev manage config by default

[jkaeser]

Adding this flag indicates the file is managed by ddev, which I think is a good default behavior. Some benefits:

• indicates to users this is something created by a third-party (especially helpful when working on a team)
• ddev can auto-update the config when users update to newer versions
• ddev can clean up the config if users remove the add-on

Thanks for putting this add-on together!

[tyler36]

Oops. Good catch!

Thank you for the PR. Once the tests pass, I'll merge and make a new release.

[tyler36]

Available in 0.2. You need to manually delete the file (or add #ddev-generated) to any current projects so that DDEV will start tracking it again.

Thanks again for submitting the PR.