#7255 tangentialArc: angle, radius point-and-click support (#7449)

* separate handling of tangentialArc with angle and radius args

* make previousEndTangent available in segment input for handling tangentialArc with angle/radius

* start adding support for editing tangentialArc with angle, radius

* draw tangentialArc sketch when using angle, radius

* fix getTanPreviousPoint when using tangentialArc with angle, radius

* fix case of unwanted negative angles when calculating angle for tangentialArc

* lint

* add test for tangentialArc dragging with andle, radius

* lint, fmt

* fix getArgForEnd for tangentialArc with radius, angle

* renaming vars

src/lib/utils.ts

@@ -55,6 +55,12 @@ export function isArray(val: any): val is unknown[] {
   return Array.isArray(val)
 }
 
+export function areArraysEqual<T>(a: T[], b: T[]): boolean {
+  if (a.length !== b.length) return false
+  const set1 = new Set(a)
+  return b.every((element) => set1.has(element))
+}
+
 export type SafeArray<T> = Omit<Array<T>, number> & {
   [index: number]: T | undefined
 }