A tool window for the rectangular sketch pattern (#799)

sketch.pattern.rectangular gets a tool window with both quantities and spacings and an optional direction, instead of a click flow with a fixed count.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

crates/ui-egui/src/locales/en.json

@@ -525,6 +525,8 @@
   "ui.profiles": "Profiles",
   "ui.project": "Project",
   "ui.project_face_edges_sketch": "Project face edges into new sketches",
+  "ui.quantity": "Quantity",
+  "ui.quantity_2": "Quantity 2",
   "ui.quit": "Quit",
   "ui.radial_context_menu": "Radial context menu",
   "ui.radius": "Radius",
@@ -573,6 +575,8 @@
   "ui.snap": "Snap",
   "ui.space_mouse_hint": "Move and rotate the view together; sketches use pan and zoom only.",
   "ui.space_mouse_navigate": "Navigate with SpaceNavigator / SpaceMouse",
+  "ui.spacing": "Spacing",
+  "ui.spacing_2": "Spacing 2",
   "ui.sphere": "Sphere",
   "ui.spline": "Spline",
   "ui.split_body": "Split Body",