Integrating the Yi family of models. (#24491)

Thank you for contributing to LangChain!

- [x] **PR title**: "community:add Yi LLM", "docs:add Yi Documentation"
                          
- [x] **PR message**: ***Delete this entire checklist*** and replace
with
- **Description:** This PR adds support for the Yi model to LangChain.
- **Dependencies:**
[langchain_core,requests,contextlib,typing,logging,json,langchain_community]
    - **Twitter handle:** 01.AI


- [x] **Add tests and docs**: I've added the corresponding documentation
to the relevant paths

---------

Co-authored-by: Bagatur <baskaryan@gmail.com>
Co-authored-by: isaac hershenson <ihershenson@hmc.edu>

libs/community/tests/unit_tests/chat_models/test_imports.py

@@ -54,6 +54,7 @@ EXPECTED_ALL = [
     "VolcEngineMaasChat",
     "ChatOctoAI",
     "ChatSnowflakeCortex",
+    "ChatYi",
 ]
 
 

libs/community/tests/unit_tests/llms/test_imports.py

@@ -98,6 +98,7 @@ EXPECT_ALL = [
     "QianfanLLMEndpoint",
     "YandexGPT",
     "Yuan2",
+    "YiLLM",
     "You",
     "VolcEngineMaasLLM",
     "WatsonxLLM",