HTTP Vary Header Parser and Utility

http-vary is a lightweight, RFC 9110 compliant utility designed for parsing and comparing HTTP Vary headers, which are crucial for ensuring correct HTTP caching behavior. It provides two primary functions: `parse()`, which normalizes a Vary header string into an array of lowercase header names (or a wildcard `'*'`), and `compare()`, used to determine if two sets of request headers are cache-equivalent based on a specified Vary header. The package is currently at version 1.0.3 and is part of the 'tinylibs' monorepo, suggesting a consistent, albeit independent, patch release cadence. Its core strength lies in its minimal footprint and strict adherence to RFC 9110, focusing exclusively on the Vary header without extraneous caching logic. This makes it ideal for environments demanding precise control over HTTP caching mechanisms. It also ships with comprehensive TypeScript types, enhancing developer experience and type safety.