Changes to Create a new social media post

added the new optional request property facebook_options/carousel/cards/items/media_id

added the new optional request property platform_overrides/facebook/content/media/media_ids

the request property facebook_options/carousel/cards/items/image became optional

added the optional property errors/content.media.images.0 to the response with the 400 status

added the new optional request property content/media/video_thumbnail

added the new optional request property tiktok_options/video_cover_timestamp_ms

added the new optional request property scheduling/repeat