[WIP] Implement .NET SDK/Semantic Kernel MCP Server

[Copilot]

Thanks for assigning this issue to me. I'm starting to work on it and will keep this PR's description up to date as I form a plan and make progress.

Original issue description:

Goal: Implement a Model Context Protocol (MCP) server using the .NET SDK and Semantic Kernel.

Context: This project demonstrates multiple ways to create and deploy MCP servers. The .NET-based server should use Semantic Kernel, be spec-compliant, and include clear build and usage instructions.

Acceptance Criteria:

• .NET MCP server implemented in dotnet-mcp/
• README with setup, usage, and deployment instructions
• Automated tests and/or evals for MCP endpoints
• Passes Copilot Coding Agent CI setup

References:

• https://docs.github.com/en/copilot/customizing-copilot/customizing-the-development-environment-for-copilot-coding-agent
• https://simplescraper.io/blog/how-to-mcp

Fixes #3.

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.