feat: Group sketch creation tools and remember variants per part (#589)

Sketch Create groups its drawing tools under Line, Rectangle, Circle, Arc, Slot, Polygon and Spline. Each family's main button starts the part's last-used variant and its caret lists the others; choices are per open part, kept across sketch sessions and tab switches, and never touch the design or undo history.

Co-authored-by: Karl Von Richter <[email protected]>

ROADMAP.md

@@ -61,6 +61,9 @@ PCB / Package, Render, Animation, Simulation, Manufacture/CAM, Drawings.
 
 ## Dimensioning and error reporting
 
+- Sketch Create groups drawing variants under Line, Rectangle, Circle, Arc, Slot,
+  Polygon and Spline. Each open part remembers its last interactive choice per family
+  across sketch sessions and document-tab switches; closing the part resets these UI choices.
 - Inscribed, circumscribed and edge polygon tools preview their actual outline before
   placement, including orientation and the selected side count.
 - Construction (X) preserves the active sketch drawing tool, picked anchors and inline