docs(go2): add getting started guide (#1339)

[spomichter]

• docs(go2): add production getting started guide

• fix(docs): move install links outside bash block as proper links

• docs(go2): recommend keeping Unitree obstacle avoidance enabled

Contributor License Agreement

• [ x] I have read and approved the CLA.

[greptile-apps]

Greptile Summary

This PR transforms the Unitree Go2 documentation from a placeholder title into a comprehensive getting started guide. It adds detailed installation instructions, usage examples, and navigation documentation with proper markdown formatting.

Key additions:

• Requirements section specifying hardware, OS, and Python version
• Installation instructions with platform-specific links
• Replay demo command for testing without hardware
• Hardware connection instructions via WebRTC
• Detailed module descriptions in a table format
• MuJoCo simulation setup
• Agentic control examples
• Blueprint reference table with 8 available configurations
• Links to deep dive documentation

The document is well-structured, provides clear commands, and properly links to existing documentation. All referenced blueprints exist in the codebase and all documentation links are valid.

Confidence Score: 5/5

• This PR is safe to merge with no risk
• Documentation-only PR that adds a comprehensive getting started guide. All referenced blueprints verified to exist in codebase, all documentation links confirmed valid, markdown formatting is correct, and content is clear and accurate.
• No files require special attention

Important Files Changed

Filename	Overview
docs/platforms/quadruped/go2/index.md	Complete getting started guide for Unitree Go2 with installation instructions, usage examples, and navigation documentation

_{Last reviewed commit: 353e93b}

[greptile-apps]

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