move jest config to a js file from package.json

jest.config.js

@@ -0,0 +1,35 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ * @oncall react_native
+ */
+
+module.exports = function jestConfig() {
+  /** @type {import('jest').Config} **/
+  const config = {
+    modulePathIgnorePatterns: ['/node_modules/', 'packages/[^/]+/build/'],
+    snapshotFormat: {
+      escapeString: true,
+      printBasicPrototype: true,
+    },
+    testEnvironment: 'node',
+    testRegex: '/__tests__/.*-test\\.js$',
+    fakeTimers: {
+      enableGlobally: true,
+      legacyFakeTimers: false,
+    },
+    transform: {
+      '\\.js$': '<rootDir>/scripts/babelJestTransformer.js',
+    },
+    setupFiles: ['<rootDir>/scripts/setupJest.js'],
+    watchPlugins: [
+      'jest-watch-typeahead/filename',
+      'jest-watch-typeahead/testname',
+    ],
+  };
+  return config;
+};

package.json

@@ -65,32 +65,6 @@
   "workspaces": [
     "packages/*"
   ],
-  "jest": {
-    "modulePathIgnorePatterns": [
-      "/node_modules/",
-      "packages/[^/]+/build/"
-    ],
-    "snapshotFormat": {
-      "escapeString": true,
-      "printBasicPrototype": true
-    },
-    "testEnvironment": "node",
-    "testRegex": "/__tests__/.*-test\\.js$",
-    "fakeTimers": {
-      "enableGlobally": true,
-      "legacyFakeTimers": false
-    },
-    "transform": {
-      "\\.js$": "<rootDir>/scripts/babelJestTransformer.js"
-    },
-    "setupFiles": [
-      "<rootDir>/scripts/setupJest.js"
-    ],
-    "watchPlugins": [
-      "jest-watch-typeahead/filename",
-      "jest-watch-typeahead/testname"
-    ]
-  },
   "license": "MIT",
   "dependencies": {},
   "engines": {