[Feature]: Improve MCP Server Implementation and Documentation

## Title

Add MCP usage examples with Claude / OpenAI

## Why

The project supports MCP server integration with LLMs, but more examples would help users. 

Test and Add documentation examples like:

### Example prompt:

`Generate GitHub Actions pipeline for Python app`

Expected MCP call:

`devopsos.scaffold.gha`

### Add:

- Claude example

- OpenAI function calling example