added pnpm, vite, and typescript support

frontend/package.json

@@ -1,6 +1,15 @@
 {
+	"scripts": {
+		"dev": "vite",
+		"build": "vite build",
+		"preview": "vite preview"
+	},
 	"dependencies": {
 		"@picocss/pico": "^2.1.1",
 		"lit": "^3.2.1"
+	},
+	"devDependencies": {
+		"ts-lit-plugin": "^2.0.2",
+		"vite": "^6.2.3"
 	}
 }