As a user, I want a method for computing the CometKiwi metric for a given translated text and its source text; so that I can score machine translations.

[laurejt]

CometKiwi is an LLM-based metric that combines COMET with OpenKiwi.

• Use the comet package and Unbabel/wmt22-cometkiwi-da HuggingFace model. Follow the example outline in the HuggingFace model card.

Inputs:

• tr_text: The text of the translation to be scored
• src_text: The original source text

Output: CometKiwi score (float), ranges between 0 and 1.