Make certain requirements optional for pypi langflow installation

[hakan-77]

Feature Request

Pip install langflow became very fragile since there are MANY 3rd party packages installed, making resolving packages very hard.

E.g. current crewai[tools] is causing such issue and failing langflow installation. I'm aware that there is a PR updating crewai version, but still, it would be great if crewai and several others could be bundled into different groups and selectively installed.

pip install langflow[all] could install like the current, the entire thing, and pip install langflow would install core components only etc.

Motivation

I have to manually pin, starting with crewai down to chomadb, versions to help pypi resolve conflicts. This is not manageable at all.

Your Contribution

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