Add CustomComponent class to langflow components

src/backend/langflow/components/custom_components/CustomComponent.py

@@ -0,0 +1,14 @@
+from langflow import CustomComponent
+from langflow.field_typing import Data
+
+
+class Component(CustomComponent):
+    display_name: str = "Custom Component"
+    description: str = "Create any custom component you want!"
+    documentation: str = "http://docs.langflow.org/components/custom"
+
+    def build_config(self):
+        return {"param": {"display_name": "Parameter"}}
+
+    def build(self, param: Data) -> Data:
+        return param