fix(UnitTests): Fixing "Cannot find module @cornerstonejs/core" error while running unit tests (#5148)

extensions/default/jest.config.js

@@ -1,13 +1,11 @@
 const base = require('../../jest.config.base.js');
-const pkg = require('./package');
 
 module.exports = {
   ...base,
-  name: pkg.name,
-  displayName: pkg.name,
   moduleNameMapper: {
     ...base.moduleNameMapper,
     '@ohif/(.*)': '<rootDir>/../../platform/$1/src',
+    '^@cornerstonejs/(.*)$': '<rootDir>/../../node_modules/@cornerstonejs/$1/dist/esm',
   },
   // rootDir: "../.."
   // testMatch: [