docs(readme): Update Edge Worker documentation with detailed overview

Enhance README with comprehensive project information:
- Add centered header with documentation link
- Include alpha stage warning
- Describe project purpose and key features
- Add architecture diagram explanation
- Highlight Edge Function optimization details
- Provide documentation reference

pkgs/edge-worker/README.md

@@ -1,7 +1,42 @@
-# Edge Worker
+<div align="center">
+  <h1>Edge Worker</h1>
+  <a href="https://pgflow.dev">
+    <h3>📚 Documentation @ pgflow.dev</h3>
+  </a>
+
+  <h4>⚠️ <strong>ALPHA STAGE - NOT PRODUCTION READY</strong> ⚠️</h4>
+</div>
 
-This library was generated with [Nx](https://nx.dev).
+A task queue worker for Supabase Edge Functions that extends background tasks with useful features.
 
-## Running unit tests
+## What is Edge Worker?
+
+Edge Worker processes messages from a queue and executes user-defined functions with their payloads. It builds upon [Supabase Background Tasks](https://supabase.com/docs/guides/functions/background-tasks) to add reliability features like retries, concurrency control and monitoring.
+
+## Key Features
+
+- ⚡ **Reliable Processing**: Retries with configurable delays
+- 🔄 **Concurrency Control**: Limit parallel task execution
+- 📊 **Observability**: Built-in heartbeats and logging
+- 📈 **Horizontal Scaling**: Deploy multiple edge functions for the same queue
+- 🛡️ **Edge-Native**: Designed for Edge Functions' CPU/clock limits
+
+## How It Works
+
+[![Architecture Diagram](https://mermaid.ink/img/pako:eNplkcFugzAMhl8lyrl9AQ47VLBxqdSqlZAGHEziASokyEkmTaXvvoR0o1VziGL_n_9Y9pULLZEnvFItwdSxc1op5o9xTUxU_OQmaMAgy2SL7N0pYXutTMUjGU5WlItYaLog1VFAJSv14paCXdweyw8f-2MZLnZ06LBelXxXRk_DztAM-Gp9KA-kpRP-W7bdvs3Ga4aNaAy0OC_WdzD4B4IQVsLMvvkIZMUiA4mu_8ZHYjW5MxNp4dUnKC9zUHJA-h9R_VQTG-sQyDYINlTs-IaPSCP00q_gGvCK2w5HP53EPyXQJczp5jlwVp9-lOCJJYcbTtq13V_gJgkW0x78lEeefMFgfHYC9an1GqPsraZ9XPiy99svlAqmtA?type=png)](https://mermaid.live/edit#pako:eNplkcFugzAMhl8lyrl9AQ47VLBxqdSqlZAGHEziASokyEkmTaXvvoR0o1VziGL_n_9Y9pULLZEnvFItwdSxc1op5o9xTUxU_OQmaMAgy2SL7N0pYXutTMUjGU5WlItYaLog1VFAJSv14paCXdweyw8f-2MZLnZ06LBelXxXRk_DztAM-Gp9KA-kpRP-W7bdvs3Ga4aNaAy0OC_WdzD4B4IQVsLMvvkIZMUiA4mu_8ZHYjW5MxNp4dUnKC9zUHJA-h9R_VQTG-sQyDYINlTs-IaPSCP00q_gGvCK2w5HP53EPyXQJczp5jlwVp9-lOCJJYcbTtq13V_gJgkW0x78lEeefMFgfHYC9an1GqPsraZ9XPiy99svlAqmtA)
+
+## Edge Function Optimization
+
+Edge Worker is specifically designed to handle Edge Function limitations:
+
+- Stops polling near CPU/clock limits
+- Gracefully aborts pending tasks
+- Uses PGMQ's visibility timeout to prevent message loss
+- Auto-spawns new instances for continuous operation
+- Monitors worker health with database heartbeats
+
+
+## Documentation
+
+For detailed documentation and getting started guide, visit [pgflow.dev](https://pgflow.dev).
 
-Run `nx test edge-worker` to execute the unit tests