Simplify Edge reversal

Keeps the old behavior where that is necessary, because a surface is
reversed.

crates/fj-kernel/src/algorithms/reverse/cycle.rs

@@ -8,7 +8,7 @@ impl Reverse for Cycle {
 
  let mut edges = self
  .into_edges()
- .map(|edge| edge.reverse())
+ .map(|edge| edge.reverse_including_curve())
  .collect::<Vec<_>>();
 
  edges.reverse();

crates/fj-kernel/src/algorithms/reverse/edge.rs

@@ -4,6 +4,6 @@ use super::Reverse;
 
 impl Reverse for Edge {
  fn reverse(self) -> Self {
- self.reverse_including_curve()
+ Edge::from_curve_and_vertices(*self.curve(), self.vertices().reverse())
  }
 }

crates/fj-kernel/src/algorithms/sweep/edge.rs

@@ -44,7 +44,7 @@ fn create_non_continuous_side_face(
  color: Color,
 ) -> Face {
  let edge = if path.is_negative_direction() {
- edge.reverse()
+ edge.reverse_including_curve()
  } else {
  *edge
  };

crates/fj-kernel/src/objects/edge.rs

@@ -239,22 +239,7 @@ impl VerticesOfEdge<Vertex> {
  ///
  /// Makes sure that the local coordinates are still correct.
  pub fn reverse(self) -> Self {
- Self(self.0.map(|[a, b]| {
- [
- Vertex::new(
- -b.position(),
- b.curve().reverse(),
- *b.surface_form(),
- *b.global_form(),
- ),
- Vertex::new(
- -a.position(),
- a.curve().reverse(),
- *a.surface_form(),
- *a.global_form(),
- ),
- ]
- }))
+ Self(self.0.map(|[a, b]| [b, a]))
  }
 
  /// Convert this instance into its global variant