Fix npm config error and code quality issues

[Copilot]

Repository contained user-specific .npmrc with hardcoded prefix causing npm errors, and had several code quality issues flagged by flake8.

Changes

Removed user-specific npm configuration

• Deleted .npmrc containing /home/samcl/.npm-global prefix
• Added .npmrc to .gitignore to prevent future commits

Fixed code quality issues

• Removed unused urlparse import
• Cleaned trailing whitespace in ASCII banner (4 lines)
• Fixed blank line formatting in __init__.py and nomad.py
• Reduced flake8 warnings from 77 to 69, eliminated all critical errors

Added setup documentation

• Created SETUP.md covering project structure, installation, development workflow, CI/CD pipeline, and common issues

Result

$ npm --version
10.8.2  # Previously: npm error config prefix cannot be changed

$ flake8 . --count --select=E9,F63,F7,F82 --statistics
0  # All critical errors resolved

Original prompt

Check at our current setup

---

💡 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.