Finish distribution market readiness

[xiaojiou176]

What changed

• add the published read-only MCP package/registry surfaces for CortexPilot and sync the repo front door to the current truth
• add public skill packaging under public-skills/
• wire the PyPI/Official MCP Registry/ClawHub/live-submission receipts into README, distribution docs, and Pages mirrors
• keep the read-only MCP runtime package lean with dedicated entrypoints and a runtime-backed control-plane read service
• fix the CLI subprocess test harness to run through orchestrator requirements instead of assuming the host interpreter already has all runtime deps

Verification

• uv build in apps/orchestrator/
• uvx twine check dist/*
• uvx twine upload dist/* -> cortexpilot-orchestrator==0.1.0a4
• mcp-publisher publish server.json
• printf ... | uvx --from cortexpilot-orchestrator==0.1.0a4 cortexpilot-readonly-mcp
• pytest -q apps/orchestrator/tests/test_mcp_readonly_server.py -k 'readonly_server_cli_supports_runs_reports_and_keeps_read_only'
• pytest -q apps/orchestrator/tests/e2e/test_god_mode_e2e.py -k 'god_mode_approval_flow'
• npx -y clawhub inspect cortexpilot-adoption-router
• Official MCP Registry search for io.github.xiaojiou176-open/cortexpilot-readonly
• MCP.so issue updated: chatmcp/mcpso#1559
• OpenHands/extensions PR tracked in OpenHands/extensions#152