chore(create-vite): add isolatedModules (#7697)

Author: sapphi-red

packages/create-vite/template-lit-ts/tsconfig.json

@@ -11,6 +11,7 @@
     "noImplicitReturns": true,
     "noFallthroughCasesInSwitch": true,
     "moduleResolution": "node",
+    "isolatedModules": true,
     "allowSyntheticDefaultImports": true,
     "experimentalDecorators": true,
     "forceConsistentCasingInFileNames": true,

packages/create-vite/template-svelte-ts/tsconfig.json

@@ -13,7 +13,8 @@
      * of JS in `.svelte` files.
      */
     "allowJs": true,
-    "checkJs": true
+    "checkJs": true,
+    "isolatedModules": true
   },
   "include": ["src/**/*.d.ts", "src/**/*.ts", "src/**/*.js", "src/**/*.svelte"],
   "references": [{ "path": "./tsconfig.node.json" }]

packages/create-vite/template-vanilla-ts/tsconfig.json

@@ -8,6 +8,7 @@
     "strict": true,
     "sourceMap": true,
     "resolveJsonModule": true,
+    "isolatedModules": true,
     "esModuleInterop": true,
     "noEmit": true,
     "noUnusedLocals": true,