chore: update ESLint and Jest configurations for improved testing setup

Author: Coderrob

eslint.config.js

@@ -131,6 +131,7 @@ export default [
           argsIgnorePattern: '^_',
         },
       ],
+      'import/no-extraneous-dependencies': ['error', { devDependencies: ['**/*.test.ts'] }],
     },
     settings: {
       'import/resolver': {

jest.config.mjs

@@ -1,7 +1,8 @@
 /** @type {import('ts-jest').JestConfigWithTsJest} **/
 export default {
   preset: 'ts-jest/presets/default-esm',
-  testEnvironment: 'node',
+  testEnvironment: 'jest-environment-node',
+  setupFilesAfterEnv: ['<rootDir>/src/test/setup.ts'],
   extensionsToTreatAsEsm: ['.ts'],
   moduleNameMapper: {
     '^(\\.{1,2}/.*)\\.js$': '$1',

src/test/setup.ts

@@ -0,0 +1,4 @@
+import { jest } from '@jest/globals';
+
+// Make jest available globally for ESM tests
+(globalThis as unknown as { jest: typeof jest }).jest = jest;