📝 docs(config.yaml): add documentation link for MultiQueryRetriever

🔧 chore(settings.py): add retrievers attribute to Settings class
The config.yaml file now includes a documentation link for the MultiQueryRetriever in the retrievers section. This link provides additional information on how to use the MultiQueryRetriever. In the settings.py file, the Settings class now includes a retrievers attribute to store retriever-related settings. This allows for easier management and configuration of retrievers in the application.

src/backend/langflow/config.yaml

@@ -230,6 +230,9 @@ utilities:
     documentation: ""
   WolframAlphaAPIWrapper:
     documentation: ""
+retrievers:
+  MultiQueryRetriever:
+    documentation: "https://python.langchain.com/docs/modules/data_connection/retrievers/how_to/MultiQueryRetriever"
 vectorstores:
   Chroma:
     documentation: "https://python.langchain.com/docs/modules/data_connection/vectorstores/integrations/chroma"

src/backend/langflow/settings.py

@@ -15,6 +15,7 @@ class Settings(BaseSettings):
     vectorstores: dict = {}
     documentloaders: dict = {}
     wrappers: dict = {}
+    retrievers: dict = {}
     toolkits: dict = {}
     textsplitters: dict = {}
     utilities: dict = {}
@@ -47,6 +48,11 @@ class Settings(BaseSettings):
         self.toolkits = new_settings.toolkits or {}
         self.textsplitters = new_settings.textsplitters or {}
         self.utilities = new_settings.utilities or {}
+        self.embeddings = new_settings.embeddings or {}
+        self.vectorstores = new_settings.vectorstores or {}
+        self.documentloaders = new_settings.documentloaders or {}
+        self.retrievers = new_settings.retrievers or {}
+
         self.dev = dev
 
     def update_settings(self, **kwargs):