fix(ssh): bundle JetBrains Mono so the terminal is monospaced everywhere - #86

Internal server error. Correlation ID: 7b9884a6-25b3-436a-955d-a307dcc05914

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/setup-dotnet@v4, actions/setup-node@v4, actions/upload-artifact@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/