[docs]: Revamp embedchain docs (#799)

docs/data-sources/docs-site.mdx

@@ -1,11 +1,14 @@
 ---
-title: 'Code Documentation'
+title: '📚🌐 Code documentation'
 ---
 
-### Code documentation
-
 To add any code documentation website as a loader, use the data_type as `docs_site`. Eg:
 
 ```python
+from embedchain import App
+
+app = App()
 app.add("https://docs.embedchain.ai/", data_type="docs_site")
-```
+app.query("What is Embedchain?")
+# Answer: Embedchain is a platform that utilizes various components, including paid/proprietary ones, to provide what is believed to be the best configuration available. It uses LLM (Language Model) providers such as OpenAI, Anthpropic, Vertex_AI, GPT4ALL, Azure_OpenAI, LLAMA2, JINA, and COHERE. Embedchain allows users to import and utilize these LLM providers for their applications.'
+```