Can disable couple photos (#5)

Add an option in family settings to disable couple photos from Web UI

Reviewed-on: #5

geneit_backend/src/services/families_service.rs

@@ -174,6 +174,7 @@ pub async fn update_family(family: &Family) -> anyhow::Result<()> {
             .set((
                 families::dsl::name.eq(family.name.clone()),
                 families::dsl::invitation_code.eq(family.invitation_code.clone()),
+                families::dsl::disable_couple_photos.eq(family.disable_couple_photos),
             ))
             .execute(conn)
     })?;