hast-util-whitespace: Inter-Element Whitespace Check

This package provides a highly specialized utility within the HAST (HTML Abstract Syntax Tree) ecosystem, designed to determine if a given node or string constitutes "inter-element whitespace" as defined by HTML specifications. Currently at stable version 3.0.0, the package adheres to the unified collective's release cadence, which typically involves major version bumps for breaking changes and Node.js compatibility updates. Its key differentiator is its precise adherence to HTML's definition of inter-element whitespace, making it crucial for tools that need to correctly manipulate or process HTML ASTs while preserving semantic meaning. It is ESM-only and ships with TypeScript types.