[Feature] Import family relationships from Parenthese and display them in People

I have searched the existing feature requests, both open and closed, to make sure this is not a duplicate request. • Yes The feature Is your feature request related to a problem? Immich recognizes people in photos, but it does not let me explore those people through their family relationships. I use [[Parenthèse]( a self-hosted family-tree application. Its Immich integration already lets users link a person in their family tree to an Immich person and retrieve their portrait. However, the family relationships recorded in Parenthèse are not available in Immich. Describe the solution you'd like Allow Immich to import or synchronize family relationships from Parenthèse, reusing the existing associations between Parenthèse people and Immich person IDs. For example, if Alice is linked to an Immich person and Parenthèse identifies Bob as her father and Claire as her sister, Alice’s person page in Immich could display a “Family” section with links to Bob and Clai…