refactor: Update ChatOutput to use MultilineInput for text input

Update the ChatOutput class in ChatOutput.py to use the MultilineInput class from the langflow library for text input. This change improves the usability and flexibility of the component, allowing for multiline messages to be passed as output.

src/backend/base/langflow/inputs/__init__.py

@@ -9,6 +9,7 @@ from .inputs import (
     PromptInput,
     SecretStrInput,
     StrInput,
+    MultilineInput,
 )
 
 __all__ = [
@@ -22,4 +23,5 @@ __all__ = [
     "DropdownInput",
     "FileInput",
     "PromptInput",
+    "MultilineInput",
 ]