Add comprehensive use cases and scenarios documentation for Developer MCP

- Create scenarios.md with 23 practical use cases across 8 categories
- Include example prompts and required tool collections for each scenario
- Add table of contents for easy navigation
- Update examples to demonstrate MCP value over standard UI operations
- Add to SUMMARY.md as "Common Use Cases and Scenarios"

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

Co-Authored-By: Claude <[email protected]>

Author: Phil Whittaker

16/umbraco-cms/SUMMARY.md

@@ -370,6 +370,7 @@
   * [Configuration](reference/developer-mcp/configuration.md)
   * [Available Tools](reference/developer-mcp/available-tools.md)
   * [Excluded Tools](reference/developer-mcp/excluded-tools.md)
+  * [Common Use Cases and Scenarios](reference/developer-mcp/scenarios.md)
   * [Making the most of the developer MCP](reference/developer-mcp/how-best-to-use.md)
 * [API versioning and OpenAPI](reference/api-versioning-and-openapi.md)
 * [Searching](reference/searching/README.md)