Ember-CLI Addon Tree Cache Key Builder

The `calculate-cache-key-for-tree` package is a low-level utility specifically designed for Ember-CLI's build pipeline to enhance performance and enable caching of intermediate build artifacts. Currently at stable version 2.0.0, its release cadence is typically infrequent, tied closely to major or minor releases of Ember-CLI itself, as it serves a foundational role within the build system. This utility is critical for addon developers who implement custom `treeFor` or `treeFor*` hooks, allowing them to provide a cache key that prevents redundant processing of unchanged addon trees by the Broccoli build system. It generates a unique identifier based on factors like the addon's name, its `package.json` contents, and the specific tree type being processed (e.g., `addon`, `vendor`, `templates`). Unlike general-purpose caching libraries, its key differentiator is its tightly integrated and specialized function within the Ember-CLI addon ecosystem, primarily utilized internally by `EmberAddon` instances rather than directly by most application developers.