move frontend to a cmd too for consistency

cmd/frontend/tsconfig.json

@@ -0,0 +1,14 @@
+{
+	"extends": "./.svelte-kit/tsconfig.json",
+	"compilerOptions": {
+		"allowJs": true,
+		"checkJs": true,
+		"esModuleInterop": true,
+		"forceConsistentCasingInFileNames": true,
+		"resolveJsonModule": true,
+		"skipLibCheck": true,
+		"sourceMap": true,
+		"strict": true
+	},
+	"include": ["src/**/*", "src/node_modules", ".svelte-kit/ambient.d.ts"] // see last element
+}