- Introduced a new helper function `_expand_vlan_range` to convert VLAN range strings into a list of individual VLAN IDs.
- Enhanced the `vlans` method in the `Qtech` class to utilize the new function, improving the handling of VLAN IDs and ensuring proper processing of both individual and range-based VLAN inputs.
- Introduced a new `Eltex` model for parsing Eltex devices.
- Created a corresponding TTP template for Eltex devices, defining required and optional groups for configuration parsing.
- Removed the `interfaces` method from the `Qtech` model, simplifying the interface processing.
- Updated the TTP template to use `mask` instead of `netmask` for IP address configuration, enhancing clarity in CIDR notation.
- Implemented the `interfaces` method to process IP addresses and netmasks, adding a calculated mask to the output.
- Added the `vlans` method to handle VLAN data, supporting both individual and grouped VLAN IDs.
- Updated the QTECH TTP template to include a new version field and improved formatting for VLAN definitions.
- Introduced a new `Qtech` model with a corresponding TTP template for parsing QTECH devices.
- Removed commented-out methods in the `Mikrotik` model to improve code clarity and maintainability.
