Add `PathBuilder` detach reset behavior tests (#1170)

[SKIKO-1113](https://youtrack.jetbrains.com/issue/SKIKO-1113) Calling
detach() twice in a row on same PathBuilder

Adding more tests to verify behavior from the report

skiko/src/commonTest/kotlin/org/jetbrains/skia/PathBuilderTest.kt

@@ -43,6 +43,28 @@ class PathBuilderTest {
         assertEquals(3, detached.pointsCount)
     }
 
+    @Test
+    fun testDetachTwiceWithoutMutationReturnsEmptyPath() {
+        val builder = PathBuilder().moveTo(0f, 0f).lineTo(10f, 10f)
+        val first = builder.detach()
+        assertEquals(2, first.pointsCount)
+
+        val second = builder.detach()
+        assertEquals(0, second.pointsCount)
+    }
+
+    @Test
+    fun testDetachAfterMutationIsAllowed() {
+        val builder = PathBuilder().moveTo(0f, 0f).lineTo(10f, 10f)
+
+        val first = builder.detach()
+        assertEquals(2, first.pointsCount)
+
+        val second = builder.moveTo(5f, 5f).lineTo(6f, 6f).detach()
+        assertEquals(2, second.pointsCount)
+        assertEquals(Point(5f, 5f), second.getPoint(0))
+    }
+
     @Test
     fun testSetFillType() {
         val path = PathBuilder()