refactor: improve category and channel management in template application

- Enhanced the process of applying templates by collecting and sorting categories before creating or updating them.
- Improved error handling and logging for category and channel creation, ensuring better feedback on operations.
- Updated channel management to reflect changes in YAML order, including position adjustments for existing channels.
- Streamlined the handling of extra channels and categories not present in the template, providing clearer warnings and options for users.
- Refactored helper functions to support new parameters for category and channel positioning, improving overall code maintainability.

Author: evolvewithevan