chore: add vitest project config and yarn constraints

apps/scandic-web/vitest.config.ts

@@ -0,0 +1,25 @@
+import react from "@vitejs/plugin-react"
+import tsconfigPaths from "vite-tsconfig-paths"
+import { defineConfig } from "vitest/config"
+
+export default defineConfig({
+  plugins: [
+    tsconfigPaths(),
+    react({
+      babel: {
+        plugins: [
+          [
+            "formatjs",
+            {
+              idInterpolationPattern: "[sha512:contenthash:base64:6]",
+            },
+          ],
+        ],
+      },
+    }),
+  ],
+  test: {
+    environment: "jsdom",
+    setupFiles: ["./vitest-setup.ts"],
+  },
+})