Automate the tree registry update process

[joergreichert]

Current state: Updating the tree data every week is done manually via executing QGIS operations and SQL scripts.

Motivation: The process can be automated, the commands and steps are well defined. Automation can run independent and would be less error prone.

Future state: There are fully automated scripts in place that download every Friday evening the new tree data, transform it and updates the existing tree data. The scripts are exected via GitHub actions.