add "Usage with Claude Code" section to README.md

[gfx]

There's no mention to Claude Code in README.md, but there should be.

The usage is described in https://docs.anthropic.com/en/docs/claude-code/tutorials#set-up-model-context-protocol-mcp

[Copilot]

Pull Request Overview

This PR adds a new "Usage with Claude Code" section to the README.md to document how to use Claude Code with MCP server tools.

• Added a new usage example section with a command snippet for invoking "claude mcp add-json".

[dimitrieh]

Thank you, this worked for me

[dimitrieh]

This is the single line command:

claude mcp add-json github '{"command":"docker","args":["run","-i","--rm","-e","GITHUB_PERSONAL_ACCESS_TOKEN","ghcr.io/github/github-mcp-server"],"env":{"GITHUB_PERSONAL_ACCESS_TOKEN":"your-token-here"}}'

[LuluBeatson]

Hi @gfx, thank you for this :)

We have recently added Claude Code instructions in our installation guides here:
https://github.com/github/github-mcp-server/blob/main/docs/installation-guides/install-claude.md