feat: initial project setup with build config and tests}
- Add gitignore, npmignore, and yarn configuration files - Add package.json with dependencies and scripts - Add TypeScript type definitions for both ESM and CommonJS - Add main implementation in both JavaScript and ESM formats - Add comprehensive test suite with Mocha - Add Grunt build configuration - Add markdownlint configuration for documentation consistency - Add MIT license and detailed README documentation - Add yarn.lock for dependency version locking