feat: validate LangGraph and CrewAI framework adapters

[welshDog]

What this adds

• Adapter tests for LangGraph/CrewAI glue.
• Optional dependency validation for LangGraph and CrewAI.
• Async crew-orchestrator bridge with X-API-Key support.
• Real coder-agent → qa-engineer → healer-agent workflow.
• GitHub Actions validation workflow.
• Local setup and release-gate documentation.

Safety

• HyperAgent-SDK remains the source of truth.
• HyperCode remains the execution authority.
• Workflow defaults to requires_approval=true.
• No Docker socket access is exposed to framework adapters.
• No secrets are committed.

Validation

• Compile adapter code.
• Run tests/test_framework_adapters.py.
• Integration smoke test against local crew-orchestrator before merge.

This is a draft until CI and local integration validation are complete.