PleromaFE bundle supporting `with_relationships` param
Should be merged at the same time as !2456 (merged) (not including the changes in single MR since it always results in merge conflicts resolution hassle once develop
gets updated with another PleromaFE bundle, but consider this and !2456 (merged) a single MR).
Note: because of OpenAPI implementation in Pleroma, would make develop
fail if merged prior to !2456 (merged) because of "unsupported parameters" PITA.
Commit: pleroma-fe!1107 (9c7cb3a9)