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/storages/vectorstores/chroma.py

@@ -64,7 +64,7 @@ class ChromaVectorStore(LlamaIndexVectorStore):
             ids: List of ids of the embeddings to be deleted
             kwargs: meant for vectorstore-specific parameters
         """
-        self._client._collection.delete(ids=ids)
+        self._client.client.delete(ids=ids)
 
     def delete_collection(self, collection_name: Optional[str] = None):
         """Delete entire collection under specified name from vector stores