Minor fixes and Improvements:

- Created jest.config.cjs for Jest setup with ESM support and coverage reporting.
- Added initial test suite for defaultFilterMeta to verify required fields and types.
- Updated exports in cli-exports.ts to properly re-export types.
- RuleDeduplicator modified to use Set for better performance in deduplication.
- Configured package.json scripts for testing with Jest and publishing packages.

Author: Greigh

.npmrc

@@ -1 +1,4 @@
-registry=https://registry.npmjs.org/
+registry=https://registry.npmjs.org/
+# Do NOT store tokens in this file. Use an environment variable or CI secret instead.
+# Example (CI/local):
+# //registry.npmjs.org/:_authToken=${NPM_TOKEN}

jest

@@ -0,0 +1,14 @@
+module.exports = {
+  // Use the ESM-aware preset for ts-jest when the package uses ESM
+  preset: 'ts-jest/presets/default-esm',
+  testEnvironment: 'node',
+  roots: ['<rootDir>/src'],
+  testMatch: ['**/*.test.ts'],
+  collectCoverage: true,
+  coverageDirectory: 'coverage',
+  coverageReporters: ['text', 'lcov'],
+  extensionsToTreatAsEsm: ['.ts'],
+  moduleNameMapper: {
+    '^@/(.*)$': '<rootDir>/src/$1',
+  },
+};