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

.zed/settings.json

@@ -0,0 +1,51 @@
+{
+	"languages": {
+		"Astro": {
+			"enable_language_server": true,
+			"formatter": "language_server",
+			"format_on_save": "on",
+			"tab_size": 2,
+			"hard_tabs": false
+		},
+		"TypeScript": {
+			"tab_size": 2,
+			"format_on_save": "on"
+		},
+		"TSX": {
+			"tab_size": 2,
+			"format_on_save": "on"
+		},
+		"CSS": {
+			"tab_size": 2,
+			"format_on_save": "on"
+		}
+	},
+	"lsp": {
+		"astro": {
+			"settings": {
+				"astro": {
+					"format": {
+						"enable": true
+					}
+				},
+				"typescript": {
+					"preferences": {
+						"importModuleSpecifier": "relative"
+					}
+				}
+			}
+		}
+	},
+	"formatter": {
+		"language_server": {
+			"name": "prettier"
+		}
+	},
+	"file_types": {
+		"Astro": ["astro"]
+	},
+	"tab_size": 2,
+	"format_on_save": "on",
+	"remove_trailing_whitespace_on_save": true,
+	"ensure_final_newline_on_save": true
+}