Add MCP server that expose the C/C++ LSP capability to Agents like Copilot

[hyh19962008]

Feature Request

Just like what the Pylance plugin does.

[sinemakinci1]

We already have C/C++ LSP capabilities exposed to agents via the C/C++ DevTools extension, including tools to get symbol references, get symbol definition, and get symbol call hierarchy.

If you have any feedback or any other capabilities you'd like to see, please let us know!