Dynamic-characterization

* Use loguru for logging.

* Renamed `characterization_function_dict` to `characterization_functions`.

* Fixed path to default characterization functions

* Fixed paths for data files

* Fixed packaging issue

* Renamed submodules:
* `dynamic_characterization.timex` -> `dynamic_characterization.ipcc_ar6`
* `dynamic_characterization.temporalis` -> `dynamic_characterization.original_temporalis_functions`
* Renamed function to apply characterization functions to `dynamic_characterization.characterize()`