feat(i18n): add i18n support and restructure pages for localization

- Configure i18n in astro.config.mjs with English as default locale
- Add translation files and i18n utilities
- Reorganize pages under [locale] subdirectory
- Update components to use translated strings
- Add language routing and fallback handling

tsconfig.json

@@ -1,7 +1,11 @@
 {
-  "extends": "astro/tsconfigs/strict",
-  "compilerOptions": {
-    "jsx": "react-jsx",
-    "jsxImportSource": "preact"
-  }
+	"extends": "astro/tsconfigs/strict",
+	"compilerOptions": {
+		"jsx": "react-jsx",
+		"jsxImportSource": "preact",
+		"baseUrl": ".",
+		"paths": {
+			"~/*": ["./src/*"]
+		}
+	}
 }