Export Benders in a dedicated repos

[JasonMarechal25]

Benders is an independent component of xpansion.
This is necessary, intentional, and good because benders is agnostic of the domain of the problem it solves.
If it was just this there would be no need for a dedicated repo.

However it appears that some teams use benders to solve problem outside of xpansion

The issue with this is that we can't add technical constraint to benders regarding xpansion as a product.
Having a dedicated repo would have the following effects:

Downside:

• Add overhead to integrate benders into xpansion (git submodule, precompiled bin, etc.)
• Two developments repos to follow for PR/commits, etc.)

Benefits:

• Prevent domain and technical restrictions from leaking to benders
• Enforce interface for input and output of benders
• Allow user of benders access benders without having to pull the entirety of xpansion