Use a dbp-rpovider in the app shell to use the attributes auth, requested-login-status and analytics-event only locally

Allow globally overriding slots in the light dom of components and use it to override the auth-info slot in the Nextcloud file picker

matomo: make side-id and git-info strings

Closes #52

See merge request !63

Lock file maintenance

See merge request !64

They can in theory be arbitrary strings, so don't try to convert them
to a number.

Fixes #52