Migrate the MVP into kotaemon (#108)

- Migrate the MVP into kotaemon.
- Preliminary include the pipeline within chatbot interface.
- Organize MVP as an application.

Todo:

- Add an info panel to view the planning of agents -> Fix streaming agents' output.

Resolve: #60
Resolve: #61 
Resolve: #62

knowledgehub/agents/tools/llm.py

@@ -1,13 +1,11 @@
-from typing import AnyStr, Optional, Type, Union
+from typing import AnyStr, Optional, Type
 
 from pydantic import BaseModel, Field
 
-from kotaemon.llms import LLM, AzureChatOpenAI, ChatLLM
+from kotaemon.llms import BaseLLM
 
 from .base import BaseTool, ToolException
 
-BaseLLM = Union[ChatLLM, LLM]
-
 
 class LLMArgs(BaseModel):
     query: str = Field(..., description="a search question or prompt")
@@ -21,7 +19,7 @@ class LLMTool(BaseTool):
         "are confident in solving the problem "
         "yourself. Input can be any instruction."
     )
-    llm: BaseLLM = AzureChatOpenAI.withx()
+    llm: BaseLLM
     args_schema: Optional[Type[BaseModel]] = LLMArgs
 
     def _run_tool(self, query: AnyStr) -> str: