Add Prompt type to CustomComponent

docs/docs/components/custom.mdx

@@ -34,6 +34,7 @@ The CustomComponent class serves as the foundation for creating custom component
   | --------------------------------------------------------- |
   | _`str`_, _`int`_, _`float`_, _`bool`_, _`list`_, _`dict`_ |
   | _`langflow.field_typing.NestedDict`_                      |
+  | _`langflow.field_typing.Prompt`_                         |
   | _`langchain.chains.base.Chain`_                           |
   | _`langchain.PromptTemplate`_                              |
   | _`langchain.llms.base.BaseLLM`_                           |
@@ -47,6 +48,13 @@ The CustomComponent class serves as the foundation for creating custom component
 
   The difference between _`dict`_ and _`langflow.field_typing.NestedDict`_ is that one adds a simple key-value pair field, while the other opens a more robust dictionary editor.
 
+  <Admonition type="info">
+      To use the _`Prompt`_ type, you must also add _`**kwargs`_ to the _`build`_ method. This is because the _`Prompt`_ type passes new arbitrary keyword arguments to it.
+
+      If you want to add the values of the variables to the template you defined, you must format the PromptTemplate inside the CustomComponent class.
+        </Admonition>
+
+
   <Admonition type="info">
       Unlike Langchain types, base Python types do not add a
     [handle](../guidelines/components) to the field by default. To add handles,