Wishlist of predefined BLMOs

[dhendryc]

For example for the cube, unit simplex, probability simplex etc.

[matbesancon]

• [x] cube LMO
• [x] (scaled) probability simplex LMO
• [x] (scaled) unit simplex LMO
• [ ] flow problems
• [ ] Birkhoff polytope with fixed variables
• [ ] Matching LMO
• [ ] Shortest Path LMO

[dhendryc]

The cube, the probability and unit simplex are implemented in #155 .

[dhendryc]

We will create a separate package for the combinatorial LMOs for both Boscia and FrankWolfe.