Update 2026 roadmap to reflect Q2 completions (85% → docs only)

[Copilot]

Mark recently completed Q2 2026 features as done in roadmap documentation. No code changes.

Completed Features Now Marked ✅

CLI Commands (Q2 2026):

• micro mcp test - Full implementation with JSON validation and RPC calls
• micro mcp docs - Generate documentation (Markdown/JSON formats)
• micro mcp export - Export to LangChain, OpenAPI, JSON

Agent SDKs (Q2 2026):

• LangChain Python package in contrib/langchain-go-micro/

Documentation Updates

Metrics:

• Q2 2026: 60% → 85% complete
• CLI commands: 3 → 5 (added test, docs, export)
• Agent SDKs: 0 → 1 (LangChain)
• Export formats: 0 → 3

Files updated:

• ROADMAP_2026.md - Q2 status "IN PROGRESS" → "MOSTLY COMPLETE"
• PROJECT_STATUS_2026.md - Updated completion tables, next priorities
• CURRENT_STATUS_SUMMARY.md - Updated metrics and executive summary
• internal/website/docs/roadmap-2026.md - Added completion checkmarks

Consistency fixes:

• Removed duplicate protocol entries in documentation section
• Added Q3/Q4 completion percentages to metrics table
• Revised recommendations to exclude completed items

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