I read project readme, checked client side and server side configurations, and no such feature exists
Yes.

Is your feature request related to a problem? Please describe.
No.

Describe the solution you'd like
I'm wondering if it would be possible to add a dynamic two-handed/one-handed weapon mechanic. That is, a weapon will use different attack animations (and possibly other properties) when used when holding / not holding another item in the offhand slot.

Describe alternatives you've considered
n/a

Additional context
n/a

Cheers

The purpose of this mod is to recreate the melee combat system of Minecraft Dungeons.
I am sorry, this suggestion falls outside of the project scope.