As a user, I want a method for translating an input text using a specific HuggingFace model, so it's easier to generate translations using different models.

[laurejt]

The method must support the following 3 models:

• tencent/HY-MT1.5-7B
• facebook/nllb-200-3.3B
• google/madlad400-7b-mt

This method should throw an error when an unsupported model is specified.

Inputs:

• src_lang: str: Source language. Use ISO 639 language codes (e.g., "zh", "ja", "es", "en")
• tgt_lang: str: Target language. Use ISO 639 language codes
• text: str: Text to be translated from the source to target language

Output: The translated text as a string.

This issue is dependent on #5, #9, #10