Genealogy as a feature (#175)

Start our journey into turning GeneIT as afully featured family intranet by making genealogy a feature that can be disabled by family admins

Reviewed-on: #175

geneit_backend/src/schema.rs

@@ -29,6 +29,7 @@ diesel::table! {
         #[max_length = 7]
         invitation_code -> Varchar,
         disable_couple_photos -> Bool,
+        enable_genealogy -> Bool,
     }
 }