Should redirect to `repo_address` if intent is not handled by app

[Iamlooker]

When sharing a app from non-default repositories (defaults: FDroid and IzzyOnDroid), we use a special url:
https://droidify.eu.org/?id=<app package name\>&repo_address=<repository address of app\>

We should handle this in our site to redirect the user to the required repository address, or atleast show a Copy repository address button