Initial commit: Discord User Bot Client for OpenClaw

- Complete project structure with pyproject.toml
- Configuration module with Pydantic validation
- SQLite database with async operations
- WebSocket client with capabilities negotiation
- Discord client using discord.py-self
- Message mapper for bidirectional conversion
- State manager for user mappings and pairing
- Unit tests for all components
- Comprehensive README documentation

Phase 1-4 complete, ready for testing

.env.example

@@ -0,0 +1,15 @@
+# Environment variables (alternative to config.yaml)
+# Copy to .env and fill in values
+
+# Discord user token
+DISCORD_TOKEN=your_discord_token_here
+
+# OpenClaw WebSocket settings
+OPENCLAW_WS_URL=ws://localhost:8765/ws
+OPENCLAW_API_KEY=your_api_key_here
+
+# Database path
+DATABASE_PATH=./state.db
+
+# Log level
+LOG_LEVEL=INFO