chore: release 4.0.0 - update changelog and cleanup

RELEASE_NOTES.md

@@ -1,44 +0,0 @@
-# Release v4.0.0: The Enterprise Era
-
-> **A massive integration of 300+ Enterprise skills, transforming Antigravity into a complete operating system for AI agents.**
-
-This release merges the best of the community with enterprise-grade capabilities, expanding our skill registry from 247 to over 550 specialized tools.
-
-## 🚀 New Skills
-
-This release integrates the entire catalog from the `rmyndharis/antigravity-skills` repository, adding depth in:
-
-### 🧩 [Architecture & Design](CATALOG.md#architecture)
-
-- **backend-architect**: Scalable API design and microservices patterns.
-- **c4-architecture**: Comprehensive system documentation strategies.
-
-### 🧪 [Data & AI](CATALOG.md#data-ai)
-
-- **rag-engineer**: End-to-end RAG system building.
-- **langchain-architecture**: Deployment patterns for LLM apps.
-
-### 🛡️ [Security](CATALOG.md#security)
-
-- **security-auditor**: Automated code auditing patterns.
-- **cloud-pentesting**: Specialized tools for AWS/Azure security.
-
----
-
-## 📦 Improvements
-
-- **Unified Catalog**: A new auto-generated `CATALOG.md` replaces the static registry, ensuring documentation never drifts from reality.
-- **Legacy Cleanup**: Removed the bulky 250+ row table from `README.md` for better load times and readability.
-- **Automation**: Introduced `scripts/build-catalog.js` to automatically maintain the skill index.
-- **Documentation**: Restructured `README.md` to focus on high-level domains rather than a flat list.
-
-## 👥 Credits
-
-A huge shoutout to our community contributors:
-
-- **@rmyndharis** for the massive contribution of 300+ Enterprise skills and the catalog generation logic.
-- **@sstklen** and **@rookie-ricardo** for their continued support and skill contributions.
-
----
-
-_Upgrade now: `git pull origin main` to fetch the latest skills._