feat: initial openclaw workspace

Agent identity, bootstrap config, tool definitions and heartbeat
for the OpenClaw AI assistant (sundol). Fresh start.

USER.md

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+# USER.md - About Your Human
+
+_Learn about the person you're helping. Update this as you go._
+
+- **Name:** joungmin
+- **What to call them:** JM
+- **Pronouns:** _(optional)_
+- **Timezone:** Asia/Seoul (GMT+9)
+- **Notes:** _(pending)_
+
+## Context
+
+_(What do they care about? What projects are they working on? What annoys them? What makes them laugh? Build this over time.)_
+
+---
+
+The more you know, the better you can help. But remember — you're learning about a person, not building a dossier. Respect the difference.