Filtering relations is not allowed
(see`packages/twenty-server/src/engine/metadata-modules/relation-metadata/dtos/relation-metadata.dto.ts`)
so we remove filtering for find many relation
we also fixed some bug in result structure and metadata open-api schema
- Improve the rest api by introducing startingAfter/endingBefore (we
previously had lastCursor), and moving pageInfo/totalCount outside of
the data object.
- Fix broken GraphQL playground on website
- Improve analytics by sending server url