`clear-all.sh` doc

**Describe the feature you'd like**

Add some usage instruction and limitations on `clear-all.sh` in docs

**Additional context**

Add any other context or screenshots about the feature request here.

Find the clear-all.sh script in the repository, likely in a scripts or tools directory. Review its current content and usage in the project. Look for existing documentation files, such as README.md or docs/, to see where to add instructions and limitations. Ensure the documentation explains what the script does, how to run it, and any important caveats.

Written by the indexing model from the issue text.