Diskuto API Release v1.0.0

https://github.com/diskuto/diskuto-api/releases/tag/v1.0.0

• Rename to diskuto-api.

• Moved to a new GitHub organization: Diskuto

• UI has been rewritten and moved into its own repository as diskuto-web.
  Expect most noteworthy changes to happen in this repository moving forward, since the API changes much less often.

• New full-stack example for local testing.

• New OpenAPI schema for the REST API. See: docs/rest_api/

Breaking API Changes

• The REST API has been relocated to /diskuto/.
  This makes it much easier to serve both diskuto-api and diskuto-web from one web host. See: nginx/default.conf for an example.

  Note: The old URLs are still available for backward compatibility but will soon be removed.

• REST API endpoints have had /proto3 suffixes removed.
  These used to be there to distinguish between the HTTP and REST API URLs.

• Some REST API paths have been renamed to be more user-friendly.
  Ex: /u/ -> /users/, /i/ -> /items/.

• See docs/rest_api/ for details.