Add OpenClaw workspace configuration and tools

- Add agent configuration files (AGENTS.md, USER.md, IDENTITY.md, SOUL.md)
- Add git configuration and skills management scripts
- Add frontend/backend analysis tools and reports
- Add DingTalk media sender utilities and documentation
- Fix OpenClaw runtime environment (Node.js and Python)
- Configure git remotes and push scripts

HEARTBEAT.md

@@ -0,0 +1,5 @@
+# HEARTBEAT.md
+
+# Keep this file empty (or with only comments) to skip heartbeat API calls.
+
+# Add tasks below when you want the agent to check something periodically.