LP sensitivity reports

[odow]

A common request when teaching LP101-type classes is for sensitivity reports similar to Excel solver.

Here is a suggestion from someone who teaches these types of classes:

We already have the information available in https://jump.dev/JuMP.jl/stable/manual/solutions/#Sensitivity-analysis-for-LP, so it's really a matter of presenting it appropriately. I don't know if we want a data frames dependency, but maybe we could use the Tables.jl interface (https://github.com/JuliaData/Tables.jl) or just print it for now, similar to solution_summary.

In fact, maybe we could just add this as additional outputs to solution_summary if you pass a sensitivity = true keyword? (This was a bad suggestion by me.)

Before working on this PR, please read the comments in #2794 to understand a previous attempt.