chore: revert changes to requirements.txt and pin ecologits

chore: generate requirements.txt

feat:light mode + token counter

feat : massive update (streamlit migration, integration of ecologits 0.6.1, dataviz, ...)

feat: update to ecologits 0.5.1 + remove own usage to fix it

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chore: pin ecologits dependency

chore: update requirements

feat: use pint to manage units

chore: separate dev and prod requirements

feat: add requirements.txt