feature/use functions not operators

[gecBurton]

Context

As an Software-Engineer I am intimidated and confused by operators, lets use functions?

Changes proposed in this pull request

Guidance to review

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Things to check

• I have added any new ENV vars in all deployed environments
• I have tested any code added or changed
• I have run integration tests

[jamesrichards4]

I like the refactor but those functions aren't handling the state they take some intermediate object which only makes sense in llm_chain. Could we use _get_text/_get_tools/etc and add an all to the module to make sure they're only used internally?

Also to go the extra step we can do:

@RunnableLamba def get_text(state: dict): pass
then we don't have to wrap it in RunnableLambda() as it's already a runnable

[gecBurton]

I really like your suggestions @jamesrichards4 and i think we can go one better still 2e27256