Add Agent QA to web interface agents

[pranshuchittora]

Summary

• Add a Source available subsection to Complete solutions → Web browser.
• List Agent QA for natural-language web application regression testing with deterministic checks, optional LLM-based grading, and reviewable run evidence.
• State the current FSL-1.1-ALv2 license and two-year Apache-2.0 conversion rather than placing it under Open source.

Validation

• git diff --check
• Confirmed the canonical Agent QA URL is unique in the README and publicly accessible.
• 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.