Update documentation. IgnorePatterns documentation out of date

Quick heads up about a change in claude config add commands:

The documentation here is out of date

<img width="601" alt="Image" src="https://github.com/user-attachments/assets/679e0fc8-462d-4887-ba53-8bb3e092f543" />

https://docs.anthropic.com/en/docs/agents-and-tools/claude-code/overview#project-configuration

If you're using claude v0.2.19 or newer:
❌ Old: claude config add ignorePatterns node_modules
✅ New: claude config set ignorePatterns node_modules

(Alternatively, this is a regression from 0.2.18), claude config add use to modify my claude.md file;

<img width="679" alt="Image" src="https://github.com/user-attachments/assets/fd9e36f9-e8fa-4416-a8bd-e7a2f84e70b5" />