add tranvsersal matroids to constructor and advanced.py

[c703ac91-1c31-4f3a-abb2-47af3ac2705d]

This will allow users to make transversal matroids from the constructor by using a bipartite graph as input. It will also add transversals to advanced.py and make other improvements to that file.

Depends on #23536

CC: @sagetrac-Stefan

Component: matroid theory

Author: Zachary Gershkoff

Issue created by migration from https://trac.sagemath.org/ticket/23628

[c703ac91-1c31-4f3a-abb2-47af3ac2705d]

Description changed:

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+This will allow users to make transversal matroids from the constructor by using a bipartite graph as input. It will also add transversals to advanced.py and make other improvements to that file.

[c703ac91-1c31-4f3a-abb2-47af3ac2705d]

comment:1

Perhaps this is a little premature since the ticket for transversal matroids hasn't been reviewed yet, but summer is quickly ending, so I'll go ahead and attempt these changes.

[c703ac91-1c31-4f3a-abb2-47af3ac2705d]

Author: Zachary Gershkoff

[c703ac91-1c31-4f3a-abb2-47af3ac2705d]

Dependencies: #23536