Bookmark is fully open source (donated to Books in Hand nonprofit, no
BSL tiering). Adds an MIT LICENSE file, a CONTRIBUTING.md scoped to an
early-stage volunteer project, and a PEP 639 license field in
pyproject.toml. Repo description and topics were also updated via the
Forgejo API for discoverability.
Implement Catalogue class with BookRecord dataclass for managing the
CSV-based book inventory. Provides operations to append records, read all
rows, update specific books, and generate unique book IDs.
5 tests passing, all functionality working as specified.
