- Added `rename` method to `Directory` struct to rename files and
directories, updating metadata and timestamps. This improves
file management capabilities.
- Added `rename` method to `OurDBVFS` to provide a unified
interface for renaming files and directories across the VFS. This
allows for consistent file system operations.
- Added tests for the new rename functionality in `vfsourdb_test.v`
to ensure correctness and robustness. This enhances confidence in
the implementation.
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