A handler executing arc moves with the configured tessellator
Remarks
The handler covers both clockwise (G2) and counter-clockwise (G3) arc
moves. The arc math itself lives in ArcTessellator; the handler routes the
resulting points into the current path and updates the job state.
G2 is for clockwise arcs, G3 is for counter-clockwise arcs.
Builds an arc move handler (G2/G3) around its own tessellator