Removing LangChain and Rebuilding Executor (#1322)

* rebuilding executor

* removing langchain

* Making all tests good

* fixing types and adding ability for nor using system prompts

* improving types

* pleasing the types gods

* pleasing the types gods

* fixing parser, tools and executor

* making sure all tests pass

* final pass

* fixing type

* Updating Docs

* preparing to cut new version

docs/how-to/Human-Input-on-Execution.md

@@ -74,7 +74,8 @@ task2 = Task(
         "Aim for a narrative that captures the essence of these breakthroughs and their implications for the future."
     ),
     expected_output='A compelling 3 paragraphs blog post formatted as markdown about the latest AI advancements in 2024',
-    agent=writer
+    agent=writer,
+    human_input=True
 )
 
 # Instantiate your crew with a sequential process