Releasing a `clickhouse-js` package

This skill is the source of truth for the release process. It supersedes the old RELEASING.md (which now just points here).

Before you start — read this

Releases are per package. There is no "release everything" button. Ask the user which package(s) they want to release and confirm — the packages are versioned independently and ship on independent cadences:
- @clickhouse/client — Node.js client (packages/client-node)
- @clickhouse/client-web — Web client (packages/client-web)
- @clickhouse/client-common — deprecated, effectively frozen; only cut a final standalone release if explicitly asked.
- @clickhouse/datatype-parser — standalone type parser (packages/datatype-parser)
- @clickhouse/rowbinary — standalone RowBinary codec skill/package (skills/clickhouse-js-node-rowbinary)