chore(express-partial-content): integrate tests and convert to vitest

packages/express-partial-content/vite.config.ts

@@ -0,0 +1,23 @@
+/// <reference types='vitest' />
+import { defineConfig } from 'vite';
+
+export default defineConfig(() => ({
+  root: __dirname,
+  cacheDir: '../../node_modules/.vite/packages/express-partial-content',
+  plugins: [],
+  // Uncomment this if you are using workers.
+  // worker: {
+  //  plugins: [ nxViteTsPaths() ],
+  // },
+  test: {
+    watch: false,
+    globals: true,
+    environment: 'jsdom',
+    include: ['{src,tests}/**/*.{test,spec}.{js,mjs,cjs,ts,mts,cts,jsx,tsx}'],
+    reporters: ['default'],
+    coverage: {
+      reportsDirectory: './test-output/vitest/coverage',
+      provider: 'v8' as const,
+    }
+  },
+}));