chore: add changeset for OpenClaw agent integration

Author: deepshekhardas

.changeset/openclaw-agent-integration.md

@@ -0,0 +1,8 @@
+---
+"@trigger.dev/core": patch
+"@trigger.dev/sdk": patch
+---
+
+feat: Add OpenClaw agent integration with Slack webhooks
+
+Implements Phase 1 MVP for AI agent platform allowing users to create agents through setup form (/agents/setup). Agents are stored in database with configuration (model, platform, tools). Slack webhook receives messages and triggers agent responses. Includes agent management UI and webhook integration infrastructure.