docs: fix dead links, stale versioning, and API-reference extraction - #34

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683, github/codeql-action/analyze@b6a472f63d85b9c78a3ac5e89422239fc15e9b3c, github/codeql-action/init@b6a472f63d85b9c78a3ac5e89422239fc15e9b3c. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/