feat: add simulator performance profiling tools

[DjDeveloperr]

Summary

• Add a new performance subsystem for simulator app processes with rolling CPU, memory, disk, and network telemetry
• Expose processes, stats, and sample through the CLI and REST API
• Add a left-panel Inspector UI with hoverable history graphs for memory, CPU, disk, and network throughput
• Update docs and the SimDeck operator guide to reflect the new performance workflow

Testing

• cargo test passed for the Rust server
• npm run build passed for the app bundle and client UI
• Verified the rebuilt daemon and API responses locally against the running simulator environment