[mypyc] Add primitives for bytearray len, indexing, item assignment and slicing - #22408

Event 'pull_request' is not allowed to trigger Actions workflows. Workflow file: '.github/workflows/docs.yml'.

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@11d5960a326750d5838078e36cf38b85af677262, actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/