[FEATURE] Active Directory/LDAP Authentication

[analog-vorort]

Is your feature request related to a problem? Please describe.
Our regulations state that users of IT systems must be authenticated via a central directory. In UTMstack, however, only local users are possible.

Describe the solution you'd like
We require a connection to a local Active Directory, LDAP or Azure AD/SSO. However, it should also be possible to use groups to map the various roles and rights.

Describe alternatives you've considered
Both local and cloud solutions would be possible.

Additional context
Is this functionality also important for others? Is there someone who could realize or implement this for us?