chore: add .mcp.json and document Redmine MCP setup in README

[pleberre]

Summary

• Adds .mcp.json registering the Redmine MCP server for Claude Code
• Documents setup in README (matching the shopify-app-remix repo format): prerequisites, how it works, verification steps

Test plan

• Verify claude mcp list | grep redmine shows ✓ Connected after setting REDMINE_URL and REDMINE_API_KEY

🤖 Generated with Claude Code

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Summary by cubic

Registers the Redmine MCP server for Claude Code via .mcp.json and adds setup instructions to the README. Enables Redmine access in Claude Code using environment variables; no secrets stored in the repo.

• Migration
  • Export REDMINE_URL and REDMINE_API_KEY in your shell profile.
  • Create /tmp/redmine-uploads (used by REDMINE_ALLOWED_DIRECTORIES).
  • Install uv if uvx is missing (brew install uv).
  • Start Claude Code and run: claude mcp list | grep redmine; expect “✓ Connected”.

^{Written for commit d6cdb05. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 3 files