Allow Yakumo-capture as a "breeding" step

[tylercamp]

Catching pals with Yakumo, whose partner skill forces its passives onto caught pals, can often be much faster than breeding passives onto pals. Pal Calc should support this as a potential "breeding" step.

e.g.

• Breed onto Yakumo -> Catch target pal
• Breed onto Yakumo -> Catch intermediate pal -> Breed intermediate pal to produce target pal

[tylercamp]

Some of the mechanics for Yakumo-capture are discussed in #84. The main blocker is how to estimate effort for capturing wild pals. Pal Calc has a very rough calculation right now, and I don't know if that's good enough to allow correct ranking of Yakumo- and non-Yakumo-paths against each other