Rename Jest config to .cjs and update .eslintignore

Renamed `jest.config.js` to `jest.config.cjs` for compatibility with CommonJS modules. Updated `.eslintignore` to exclude `.cjs` files to prevent linting issues.

jest.config.cjs

@@ -0,0 +1,22 @@
+module.exports = {
+    setupFilesAfterEnv: ['./scripts/jest.setup.js'],
+    preset: 'ts-jest',
+    testEnvironment: 'node',
+    testMatch: ['**/__tests__/**/*.test.ts', '**/?(*.)+(test).ts'],
+    testPathIgnorePatterns: ['\\.spec\\.ts$', '\\.performance\\.test\\.ts$'],
+    moduleDirectories: ['node_modules', 'src'],
+    moduleNameMapper: {
+        '^src/(.*)$': '<rootDir>/src/$1',
+    },
+    collectCoverage: true,
+    coverageDirectory: '.locale/coverage',
+    coverageReporters: ['text', 'lcov'],
+    coverageThreshold: {
+        global: {
+            branches: 70,
+            functions: 70,
+            lines: 70,
+            statements: 70,
+        },
+    },
+};