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

astro.config.mjs

@@ -0,0 +1,13 @@
+import sitemap from "@astrojs/sitemap";
+import tailwind from "@astrojs/tailwind";
+import { defineConfig } from "astro/config";
+
+// https://astro.build/config
+export default defineConfig({
+	integrations: [tailwind(), sitemap()],
+	site: "https://lorenzoiovino.com",
+	compressHTML: true,
+	build: {
+		inlineStylesheets: "auto",
+	},
+});