### Changes:
- Renamed `nodes` to `nouns` and `edges` to `verbs` across `opfsStorage.ts`, improving code semantics:
- Directory constants (e.g., `NODES_DIR` → `NOUNS_DIR`).
- Class properties, method names, and variables updated accordingly.
- Introduced global type augmentation for `FileSystemDirectoryHandle` to support `entries()` method, improving compatibility.
- Updated directory management logic:
- Adjusted initialization, recreation, and metadata retrieval methods to reflect new nomenclature.
- Enhanced handling for directory entries in both `nouns` and `verbs` contexts.
- Refined comments, formatting, and TypeScript annotations for consistency.
### Purpose:
Improved the code's readability and semantic clarity by aligning directory and variable names with their conceptual purpose (`nouns` for entities, `verbs` for relationships). Enhanced maintainability and developer understanding of the storage implementation.