Add Agent QA to computer-use projects

[pranshuchittora]

Summary

• Add Agent QA to the computer-use Projects section.
• Describe its browser, Android, and iOS regression-testing scope, deterministic checks, and reviewable run evidence.
• Normalize the README's previously missing final newline; no existing text is changed.

Validation

• git diff --check
• Confirmed the canonical Agent QA URL is unique in the repository.
• Searched repository code, issues, and pull requests for an existing Agent QA entry immediately before submission.

Disclosure

I am affiliated with Agent QA and Vostride and am proposing this listing on the project's behalf.