docs: add initial docs/ information architecture + stubs

docs/getting-started/README.md

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+# Getting started
+
+## What is Mission Control?
+
+Mission Control is the web UI and HTTP API for operating OpenClaw.
+
+It provides a control plane for boards, tasks, agents, approvals, and (optionally) gateway connections.
+
+## Quickstart (Docker Compose)
+
+From repo root:
+
+```bash
+cp .env.example .env
+
+# REQUIRED when AUTH_MODE=local
+# Set LOCAL_AUTH_TOKEN to a non-placeholder value with at least 50 characters.
+
+docker compose -f compose.yml --env-file .env up -d --build
+```
+
+Open:
+- Frontend: http://localhost:3000
+- Backend health: http://localhost:8000/healthz
+
+## Next steps
+
+- [Authentication](../reference/authentication.md)
+- [Deployment](../deployment/README.md)
+- [Development](../development/README.md)