[WIP] Building blocks for shape reuse #102
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Builds on work to move IR to
kurbo::BezPath
as that makes the manipulations for reuse much more natural.TODO: BezPath doesn't support arc, what do we do about that? - it will matter when we reach Noto Emoji. Since the font format does not, and for the forseeable future will not, support arc maybe normalizing arcs that became cubics is ok?
Name shape-brokkr continues the Norse theme and honors https://en.wikipedia.org/wiki/Brokkr.