docs: enhance README header with expanded scope and future roadmap

Update README.md tagline to:
- Clarify support for both Claude AI & Claude Code
- Include web and mobile engineering teams in current scope
- Signal future expansion to additional team roles

This better reflects the growing library and sets expectations
for continued skill development across more domains.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

README.md

@@ -1,6 +1,6 @@
 # Claude Skills Library
 
-**Production-ready skill packages for Claude AI** - Reusable expertise bundles combining best practices, analysis tools, and strategic frameworks for marketing teams, executive leadership, and product development teams.
+**Production-Ready skill packages for Claude AI & Claude Code** - Reusable expertise bundles combining best practices, analysis tools, and strategic frameworks for marketing teams, executive leadership, product development, your web and mobile engineering teams. Many other teams will be included soon and regularly.
 
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 [![Claude AI](https://img.shields.io/badge/Claude-AI-blue.svg)](https://claude.ai)