chore(): start moving some packages to the core directory (#7215)

packages/core/utils/jest.config.js

@@ -0,0 +1,13 @@
+module.exports = {
+  transform: {
+    "^.+\\.[jt]s?$": [
+      "ts-jest",
+      {
+        tsconfig: "tsconfig.spec.json",
+        isolatedModules: true,
+      },
+    ],
+  },
+  testEnvironment: `node`,
+  moduleFileExtensions: [`js`, `ts`],
+}