Silent-Watcher/npm-name-checker

AI Summary: This issue proposes migrating the project's bundler from `tsup` to `tsdown`. The primary motivation is that `tsup` is no longer actively maintained, while `tsdown` is its modern, actively developed successor, promising better performance and developer experience.

AI Summary: This GitHub issue proposes replacing the `chalk` library with Node.js's built-in `util.styleText` for terminal string styling. The change aims to reduce external dependencies, improve installation times, and leverage native Node.js features. It involves auditing existing `chalk` imports, updating styling calls, removing the dependency, updating documentation, and testing the styled output.