TLS Test for npm

The `tls-test` package, currently at version `0.0.1`, is a specialized diagnostic utility designed to verify that a user's Node.js and npm client environment supports TLS 1.2 or higher for connecting to the public npm registry. It was primarily introduced as a compatibility checker ahead of npm's enforcement of TLS 1.2 on October 4, 2021. This package is not a general-purpose library, nor does it have a regular release cadence, serving instead as a static test. Its key differentiator is providing a direct, isolated test against an HTTPS endpoint already enforcing TLS 1.2, allowing users to confirm their setup without waiting for the full registry enforcement. While the enforcement date has passed, it remains valuable for troubleshooting connectivity issues on legacy systems, custom Node.js builds, or restrictive network environments where TLS compatibility might still be a concern.