Added some documentation

shared/channels/src/channels/amqp_helpers.py

+"""
+File that contains a collection of helper functions that provide easy access to common AMQP functions, such as
+opening and closing connections and channels, sending events, and listening for events
+"""
 import json
 from abc import ABC, abstractmethod
 from typing import Callable, Any, Optional, Union, TypeVar, Protocol, Generic
@@ -16,6 +20,9 @@ CONN = None
 
 
 class ChannelDefinition(Protocol[T]):
+    """
+    Abstract implementation of an AMQP channel
+    """
     @abstractmethod
     def routing_key_for(self, message: T) -> str:
         pass
@@ -35,6 +42,9 @@ class ChannelDefinition(Protocol[T]):
 
 
 class WorkflowEventChannel(ChannelDefinition[WorkflowEvent]):
+    """
+    Class that represents an AMQP channel connected to the Workflow Service exchange
+    """
     EXCHANGE = "workspaces.workflow-service.workflow-status"
 
     def schema(self) -> Schema: