Adds a PostToolUse hook that runs gofmt on any .go file after
Edit or Write operations, ensuring consistent formatting.

Add gofmt hook to auto-format Go files on edit

Adds card pin/unpin subcommands and a top-level pin list command
to support the new pins API endpoints.

The API uses POST/DELETE on /reading.json, not /read.json and
/unread.json. Also handle nil response data from 204 No Content.

When the API returns non-JSON error responses (e.g. HTML 401 pages),
the JSON parse error was masking the proper HTTP status error. Moving
the status check first ensures correct error codes are returned.

Tests for missing --board and auth login checked wrong config path or
leaked the default board from the global config file. Use temp HOME to
isolate, check both config paths, and drop pagination assertion for
single-page results.

Add pins API support and fix pre-existing e2e failures

The skill file was previously hosted in a separate fizzy-skill repo.
Now managed here directly and the skill command downloads from this
repo instead.

Move SKILL.md into this repo