feat: Add command queuing for disconnection resilience

[PhilipLudington]

Summary

• Add CommandQueue class with configurable size (100 commands) and timeout (60s) for storing commands when Unity is disconnected
• Integrate queue with McpUnity for automatic queuing during reconnection states
• Add per-request queueIfDisconnected option in SendRequestOptions for opt-in queuing behavior
• Auto-cleanup expired commands with periodic timer and replay queued commands on connection restore

Changes

• Server~/src/unity/commandQueue.ts - New CommandQueue class implementation
• Server~/src/unity/mcpUnity.ts - Integration with connection state management
• Server~/src/__tests__/commandQueue.test.ts - 21 Jest tests for comprehensive coverage

Test plan

• All 21 Jest tests pass for CommandQueue functionality
• Tests cover: enqueue/drain, queue limits, timeout handling, statistics, cleanup
• Manual testing with Unity disconnection/reconnection scenario

🤖 Generated with Claude Code

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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[CoderGamester]

Nice work @PhilipLudington
This is a very good solution for the annoying connection losses for the domain reload problems with Unity.

Thank you very much

[PhilipLudington]

@CoderGamester Thank you, love a good solution to a problem!