Gcapi

- Added support for display items

- Added line answer types to other schemas

- Added line answer types to reader study schema

- **Breaking Change** Removed `_IMAGE` answer types
- Added support for python 3.9 and 3.10
- Added line answer types

- Added `archive_item` to `upload_cases` which allows adding images to
existing archive items
- Added `interface` to `upload_cases` which allows specifying the
image type when uploading to archive and archive items. Can only be
used in combination with `archive` or `archive_item`.
- Added `update_archive_item` which allows editing of archive item
values

- Fix redirect from `reader_study.ground_truth`