feature/prepare for npm

[r-el]

• Refine .npmignore to exclude test and examples directories while retaining test files
• Add initial changelog documenting project features and future improvements
• Update package.json description and keywords
• Add CI/CD pipeline configuration for testing, publishing, and linting
• Add scripts to include example runs and ensure tests are executed before publishing in package.json file
• docs: add publishing guide with CI/CD setup