featmigrate from Angular to Astro static site

BREAKING CHANGE: Complete rewrite from Angular SPA to Astro

- Replace Angular 18 with Astro 5.16.7 + Tailwind CSS
- Convert all Angular components to Astro components
- Add content collections for blog with markdown support
- Setup S3 deployment with CloudFront invalidation
- Add RSS feed and sitemap generation
- Configure Prettier and Biome for code formatting
- Switch from npm to pnpm
- Remove Amplify backend (now fully static)
- Improve SEO and performance with static generation

src/assets/linkedin.svg

@@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?><!-- Uploaded to: SVG Repo, www.svgrepo.com, Generator: SVG Repo Mixer Tools -->
-<svg width="800px" height="800px" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
-<path d="M6.5 8C7.32843 8 8 7.32843 8 6.5C8 5.67157 7.32843 5 6.5 5C5.67157 5 5 5.67157 5 6.5C5 7.32843 5.67157 8 6.5 8Z" fill="#0F0F0F"/>
-<path d="M5 10C5 9.44772 5.44772 9 6 9H7C7.55228 9 8 9.44771 8 10V18C8 18.5523 7.55228 19 7 19H6C5.44772 19 5 18.5523 5 18V10Z" fill="#0F0F0F"/>
-<path d="M11 19H12C12.5523 19 13 18.5523 13 18V13.5C13 12 16 11 16 13V18.0004C16 18.5527 16.4477 19 17 19H18C18.5523 19 19 18.5523 19 18V12C19 10 17.5 9 15.5 9C13.5 9 13 10.5 13 10.5V10C13 9.44771 12.5523 9 12 9H11C10.4477 9 10 9.44772 10 10V18C10 18.5523 10.4477 19 11 19Z" fill="#0F0F0F"/>
-<path fill-rule="evenodd" clip-rule="evenodd" d="M20 1C21.6569 1 23 2.34315 23 4V20C23 21.6569 21.6569 23 20 23H4C2.34315 23 1 21.6569 1 20V4C1 2.34315 2.34315 1 4 1H20ZM20 3C20.5523 3 21 3.44772 21 4V20C21 20.5523 20.5523 21 20 21H4C3.44772 21 3 20.5523 3 20V4C3 3.44772 3.44772 3 4 3H20Z" fill="#0F0F0F"/>
-</svg>