feat: add .npmignore file to exclude unnecessary files from npm package

This commit adds a .npmignore file to the project. This file is used to prevent unnecessary files and directories (like tests, types, and configuration files) from being included when the project is packaged for distribution via npm. This helps to keep the package size small and only includes the files necessary for the package to function.

.npmignore

@@ -0,0 +1,44 @@
+# Dependency directories
+node_modules/
+
+# TypeScript source files
+src/
+
+# TypeScript type definition source files
+types/
+
+# Testing files
+test/
+tests/
+__tests__/
+*.spec.ts
+*.test.ts
+
+# Configuration files
+tsconfig.json
+tsconfig.build.json
+jest.config.js
+.babelrc
+.eslintrc.js
+.prettierrc
+.gitignore
+.npmignore
+.editorconfig
+.env
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+# Build output directory
+!dist/
+
+# Documentation
+README.md
+CHANGELOG.md
+!LICENSE
+
+# Others
+*.log
+.DS_Store
+Thumbs.db