Bezier-rs: Make rectangle constructor produce linear segments (#2109)

* fix(bezier-rs): new_rect constructor create linear segments

* refactor

libraries/bezier-rs/src/subpath/core.rs

@@ -225,9 +225,13 @@ impl<PointId: crate::Identifier> Subpath<PointId> {
 		Self::new(anchor_positions.into_iter().map(|anchor| ManipulatorGroup::new_anchor(anchor)).collect(), closed)
 	}
 
+	pub fn from_anchors_linear(anchor_positions: impl IntoIterator<Item = DVec2>, closed: bool) -> Self {
+		Self::new(anchor_positions.into_iter().map(|anchor| ManipulatorGroup::new_anchor_linear(anchor)).collect(), closed)
+	}
+
 	/// Constructs a rectangle with `corner1` and `corner2` as the two corners.
 	pub fn new_rect(corner1: DVec2, corner2: DVec2) -> Self {
-		Self::from_anchors([corner1, DVec2::new(corner2.x, corner1.y), corner2, DVec2::new(corner1.x, corner2.y)], true)
+		Self::from_anchors_linear([corner1, DVec2::new(corner2.x, corner1.y), corner2, DVec2::new(corner1.x, corner2.y)], true)
 	}
 
 	/// Constructs a rounded rectangle with `corner1` and `corner2` as the two corners and `corner_radii` as the radii of the corners: `[top_left, top_right, bottom_right, bottom_left]`.

libraries/bezier-rs/src/subpath/structs.rs

@@ -76,6 +76,10 @@ impl<PointId: crate::Identifier> ManipulatorGroup<PointId> {
 		Self::new(anchor, Some(anchor), Some(anchor))
 	}
 
+	pub fn new_anchor_linear(anchor: DVec2) -> Self {
+		Self::new(anchor, None, None)
+	}
+
 	/// Construct a new manipulator group from an anchor, in handle, out handle and an id
 	pub fn new_with_id(anchor: DVec2, in_handle: Option<DVec2>, out_handle: Option<DVec2>, id: PointId) -> Self {
 		Self { anchor, in_handle, out_handle, id }