Remove committed test screenshot artifacts and keep only a README

Problem/Motivation

The tests/screenshots/ directory on the 9.2.x branch of the Varbase Project Template has 100 committed webship-js (Playwright + Cucumber-js) failure artifacts (failed_*.png / failed_*.html). These files are generated on every test run for failed scenarios and should never be committed to the repository.

The root .gitignore already ignores tests/screenshots/, tests/videos/ and tests/reports/, but the 100 files were committed before that ignore rule was added, so they remain tracked in git and clutter the working tree and repository size.

Steps to reproduce

Proposed resolution

Delete the 100 committed failed_* files under tests/screenshots/, and add a README.md to each of tests/screenshots/, tests/videos/ and tests/reports/ so the directories persist in git while their generated contents stay untracked. Update .gitignore so it ignores everything in those three directories except their README.md file.

Remaining tasks

• ✅ File an issue about this project
• ❌ Addition/Change/Update/Fix to this project
• ❌ Testing to ensure no regression
• ➖ Automated unit/functional testing coverage
• ➖ Developer Documentation support on feature change/addition
• ➖ User Guide Documentation support on feature change/addition
• ➖ UX/UI designer responsibilities
• ➖ Accessibility and Readability
• ❌ Reviewed by a human
• ❌ Code review by maintainers
• ❌ Full testing and approval
• ❌ Credit contributors
• ❌ Review with the product owner
• ❌ Update Release Notes
• ✅ Release varbase_project-9.2.0

User interface changes

• N/A

API changes

• N/A

Data model changes

• N/A

Release notes snippet

• N/A