* 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
* feat: add ability to set LLM for AgentPLanner on Crew
* feat: fixes issue on instantiating the ChatOpenAI on the crew
* docs: add docs for the planning_llm new parameter
* docs: change message to ChatOpenAI llm
* feat: add tests
* feat: add planning feature to crew
* feat: add test to planning handler and change to execute_async method
* docs: add planning parameter to the Core documentation
* docs: add planning docs
* fix: fix type checking issue
* fix: test and logic
