feat(vscode): add vitest integration

.vscode/extensions.json

@@ -1,3 +1,7 @@
 {
-  "recommendations": ["lokalise.i18n-ally", "editorconfig.editorconfig"]
+  "recommendations": [
+    "lokalise.i18n-ally",
+    "editorconfig.editorconfig",
+    "vitest.explorer"
+  ]
 }

vitest.workspace.ts

@@ -0,0 +1,4 @@
+export default [
+    "vitest.config.ts",
+    "src/public/app/vitest.config.ts"
+];