feat(auth): show GitHub account selection before authorization - #200

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/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02, jdx/mise-action@5228313ee0372e111a38da051671ca30fc5a96db. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/