Change friendship here.
Can also cheat all friendships (of all villagers, for all saved players) to 255 by shift clicking the drop-down button instead.
Similar to main's adaption in a prior commit, let's use the relative offsets.
adds total nook miles earned to editor
fixes the off-by-one indexing for achievement list
Closes#101 ; updates dumper to use the correct off-by-one and adds a bunch of extra documentation values
I'm sure the thresholds are dumpable, but I don't think they're enforced maximums (future milestone additions)
ty @CanoeHope !
