Merge pull request #34344 from overleaf/copilot/convert-fetch-utils-to-es-modules

Convert @overleaf/fetch-utils to TypeScript ESM with Vitest, enable noImplicitAny, fix downstream regressions, and align buildscript generation

GitOrigin-RevId: e060152f056cbae31da0650fb22471525835bd5e

libraries/fetch-utils/vitest.config.ts

@@ -0,0 +1,25 @@
+import { defineConfig, ViteUserConfig } from 'vitest/config'
+
+let reporterOptions: ViteUserConfig['test'] = {}
+if (process.env.CI) {
+  reporterOptions = {
+    reporters: [
+      'default',
+      [
+        'junit',
+        {
+          classnameTemplate: `Unit tests.{filename}`,
+        },
+      ],
+    ],
+    outputFile: 'reports/junit-vitest-unit.xml',
+  }
+}
+export default defineConfig({
+  test: {
+    include: ['test/unit/**/*.test.{js,ts}'],
+    setupFiles: ['./test/setup.js'],
+    isolate: false,
+    ...reporterOptions,
+  },
+})