Allow seeking SumTree cursor by multiple seek types per dimension

Also, remove the cursor's sum_dimension. Replace it with a
blanket implementation of Dimension for two-element tuples
of dimensions.

Co-Authored-By: Nathan Sobo <nathan@zed.dev>
ab31ddfc31Max Brunsfeld committed on 9/25/2021, 1:23:53 AMparent39fbf7d
11 files changedLine totals unavailable