feat: Added WatsonxRerank integration, update logic of passing params

[MateuszOssGit]

Added WatsonxRerank integration:

• WatsonxRerank init:

  wx_client = APIClient(
      credentials={
          "url": URL,
          "apikey": WX_APIKEY,
      }
  )
  wx_rerank = WatsonxRerank(
      model_id=MODEL_ID, project_id=WX_PROJECT_ID, watsonx_client=wx_client
  )
  
  # OR
  
  wx_rerank = WatsonxRerank(model_id=MODEL_ID, url=URL, apikey=WX_APIKEY, project_id=WX_PROJECT_ID)

• WatsonxRerank call:

  • rerank() method

   test_documents = [
        Document(page_content="This is a test document."),
        Document(page_content="Another test document."),
    ]
    test_query = "Test query"
    results = wx_rerank.rerank(test_documents, test_query)

  • compress_documents() method

    doc_list = [
        "The Mediterranean diet emphasizes fish, olive oil, and vegetables"
        ", believed to reduce chronic diseases.",
        "Photosynthesis in plants converts light energy into glucose and "
        "produces essential oxygen.",
        "20th-century innovations, from radios to smartphones, centered "
        "on electronic advancements.",
        "Rivers provide water, irrigation, and habitat for aquatic species, "
        "vital for ecosystems.",
        "Apple’s conference call to discuss fourth fiscal quarter results and "
        "business updates is scheduled for Thursday, November 2, 2023 at 2:00 "
        "p.m. PT / 5:00 p.m. ET.",
        "Shakespeare's works, like 'Hamlet' and 'A Midsummer Night's Dream,' "
        "endure in literature.",
    ]
    documents = [Document(page_content=x) for x in doc_list]
  
    result = wx_rerank.compress_documents(
        query="When is the Apple's conference call scheduled?", documents=documents
    )

Updated logic of passing params:

• params in init:
  When user pass params in init every call using provided params, except case when user pass params in method
• params in method:
  When user pass params in method they are used, params from init are not used

[Wojciech-Rebisz]

Nicely done!