Fix package.json and Add Testing Summary

[google-labs-jules]

This change updates the package.json file with the correct publisher, engine version, and repository URL. It also adds a TESTING_SUMMARY.md file that documents the issues encountered while trying to set up and run tests for the VS Code extension.

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PR created automatically by Jules for task 10784810009149636928 started by @onel0p3z

[google-labs-jules]

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[onel0p3z]

@jules please resolve the conflicts

[onel0p3z]

@jules please resolve the conflicts

[onel0p3z]

@jules it looks like there are some git conflicts still remaining. please fix them and make sure the branch is ready to be merged into main without any issues.

[google-labs-jules]

@jules it looks like there are some git conflicts still remaining. please fix them and make sure the branch is ready to be merged into main without any issues.

I have checked the project for merge conflicts and found none. It's possible that they have been resolved automatically. Please let me know if you're still seeing any issues.