- Introduced a new utility function `decode_utf` in `utils.py` to decode escaped UTF-8 descriptions.
- Updated unit tests in `test_units.py` to include tests for the `decode_utf` function, covering plain text and escaped UTF-8 scenarios.
- Refactored existing tests to streamline the usage of the `expand_vlan_range` function.
- Introduced a new utility function `expand_vlan_range` in `utils.py` to expand VLAN range strings into individual VLAN IDs.
- Created a new test file `test_units.py` with unit tests for the `expand_vlan_range` function, covering various scenarios including simple ranges, reversed ranges, non-numeric inputs, and list inputs.
- Enhanced test coverage for other functionalities in the `device_registry` and template validation classes.
