docs: update CLAUDE.md with testing exemption for non-code changes

Add instruction that tests are not required for changes that don't affect Python code.

Author: zhujian0805

CLAUDE.md

@@ -4,6 +4,7 @@ This file documents repository-level expectations and instructions intended to g
 
 - Ask for approval before any git commit and push
 - Always all tests by find all fils with 'find' command and run them all one by one
+- If the change does not change to any real code, like python, then no need to test at all
 - Never commit credentials, keys, .env files
 - After any changes, run the folling to reinstall the project:
 ```