docs: Professional README rewrite with comprehensive feature coverage v0.0.10

- Centered headers with VS Code marketplace badges
- Complete feature coverage: Apps Hub, API Gateway, MCP, Security
- Cost comparison table
- Integrations: LangChain, LlamaIndex, AutoGPT, CrewAI
- Collapsible troubleshooting section
- Screenshots: Apps.png, Swagger.png, Showcase.png
- Professional marketing-focused language

Author: suhaibbinyounis