doc:llm usage document and install document update

docs/getting_started/application.rst

@@ -2,7 +2,7 @@ Applications
 ==================================
 DB-GPT product is a Web application that you can chat database, chat knowledge, text2dashboard.
 
-.. image:: ./assets/DB-GPT-Product.jpg
+.. image:: https://github.com/eosphoros-ai/DB-GPT/assets/13723926/f6564da2-bed3-43ad-9659-d00e0eeb255b
 
 
 - Chat DB

docs/getting_started/install.rst

@@ -20,5 +20,6 @@ DB-GPT product is a Web application that you can chat database, chat knowledge,
    ./install/deploy/deploy.md
    ./install/docker/docker.md
    ./install/docker_compose/docker_compose.md
+   ./install/llm/llm.rst
    ./install/environment/environment.md
    ./install/faq/deploy_faq.md

docs/getting_started/install/llm/llm.rst

@@ -2,9 +2,21 @@ LLM Usage
 ==================================
 DB-GPT provides a management and deployment solution for multiple models. This chapter mainly discusses how to deploy different models.
 
-.. image:: ./assets/llm/dbgpt_llm.jpg
+.. image:: https://github.com/eosphoros-ai/DB-GPT/assets/13723926/a0d0840f-570a-4409-bb7d-bec6535a5f62
 
 
+Multi LLMs Support, Supports multiple large language models, currently supporting
+  - 🔥 Vicuna-v1.5(7b,13b)
+  - 🔥 llama-2(7b,13b,70b)
+  - WizardLM-v1.2(13b)
+  - Vicuna (7b,13b)
+  - ChatGLM-6b (int4,int8)
+  - ChatGLM2-6b (int4,int8)
+  - guanaco(7b,13b,33b)
+  - Gorilla(7b,13b)
+  - Baichuan(7b,13b)
+  - OpenAI
+
 - llama_cpp
 - quantization