v0.2.1

Statelessness release:

• Removes local share cache and cache commands. CLI is stateless except auth.
• shares info is now deterministic: use --document-id; --id hard-fails with guidance if server returns 404.

See: #31

What's Changed

• refactor: remove share cache by @casey-brooks in #31

Full Changelog: v0.2.0...v0.2.1