Add Psuedocost Branching Routines

[mewilhel]

Thanks for your interest in EAGO! You can use this Github issue to suggest new
features or make recommendations on additional documentation for EAGO.

If your feature request is related to a problem, please describe the problem.
N/A

Describe the solution you'd like
Add Psuedocost branching routines to EAGO as opposed to just relative max width.

Provide any other context you think we'd find helpful

Thanks for your contribution to EAGO!