Cacilie/set-theory

AI Summary: The task requires adding documentation for the symbols used in the TypeScript Set Theory library to improve its JSR (JavaScript Standard Registry) score. This involves following the JSR documentation guidelines for symbol documentation and updating the library's documentation accordingly.

AI Summary: Verify the compatibility of the TypeScript Set Theory library with Node.js to ensure its suitability for inclusion in the JSR (JavaScript Standard Registry). This involves testing the library's functionality within a Node.js environment and addressing any compatibility issues that arise.