Lists parity gaps: GitHub-backed lists, saved views, view modes and collaborative editing #49

Where this stands

:feature:lists covers list CRUD, the schema editor, rows, folders, watchers, connections,
contributors, share links, shared-with-me and search. Four substantial web capabilities have no
Android equivalent, and list creation drops several fields the API accepts.

Verified gaps

CreateListRequest sends title, description, schema, isPublic. POST /api/lists also accepts
parentId, messageId, metadata, source, githubRepo, githubSource
and initialRows.

Unused endpoints: GET|POST /api/lists/{id}/views, PUT|DELETE|POST /api/lists/{id}/views/{viewId},
POST /api/lists/{id}/data/versions, GET /api/lists/shared/{token}/data.

Reference: /help/lists, and the features page's "view data as cards, a grid, or an ERD
diagram".

Filed from the parity review of feature/parity-wip @ 14d7795 against interlinedlist.com (OpenAPI /api/openapi.json, 233 paths) and the public help centre.