Front-End-Performance-Checklist

What does this PR do? Adds PageGuard to the Performance tools section. PageGuard is a free all-in-one website health scanner that checks: Performance — Core Web Vitals, load time, resource optimization Accessibility — WCAG 2.1 / ADA compliance issues SEO — meta tags, structured data, crawlability Best Practices — security headers, HTTPS, mobile-friendliness It fits alongside tools like GTmetrix, DebugBear, and Yellow Lab Tools as a comprehensive website monitoring and auditing solution. Why add it? Free tier available — no account required for single scans Real-time AI-powered analysis with actionable recommendations Covers performance and other dimensions in one scan (useful for quick health checks) No sign-in required to get started: https://pageguard.org

Hi, I have added a new tool, npm-compare.com, to the README under the section for comparing libraries. This tool use AI to recommend the most suitable packages based on your project needs Thanks for considering my PR!

Fixes: # 🚨 Please review the guidelines for contributing and our code of conduct to this repository. 🚨 Please complete these steps and check these boxes (by putting an x inside the brackets) before filing your PR: [x] Check the commit's or even all commits' message styles matches our requested structure. [x] Check your code additions will fail neither code linting checks nor unit test. Short description of what this resolves: packtracker.io seems to be dead, this replaces it with Gravity which is a very similar tool: https://gravity.ci/ Proposed changes: remove the (dead) link to packtracker.io add link to Gravity as a replacement 👍 Thank you!