[Feature request] Insertion-only plots

[Kerbinator-Fras]

When we're doing pre-calculations of gravity assists with bi-impulse transfers, we will need this solution of transfer to minimize the insertion burn, cuz depature burn (from the last intermediate planet) can be get from various ways as relative speed lmao For example, recently plotting a KEKKJ-Dres solution and we can get literally any speed from jool via various boosts of Tylo and laythe. So I need to figure out what is the smallest Dres insertion burn with any speed from Jool......