Bézier-rs: Add utils to subpath (#1058)

* Add utils to bezier-rs subpath

* Apply code review changes

* Remove tan from constant

* Fix compile

* Fix tests

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

@@ -12,12 +12,18 @@ use std::fmt::{Debug, Formatter, Result};
 use std::ops::{Index, IndexMut};
 
 /// Structure used to represent a path composed of [Bezier] curves.
-#[derive(Clone, PartialEq)]
+#[derive(Clone, PartialEq, Hash)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
 pub struct Subpath<ManipulatorGroupId: crate::Identifier> {
 	manipulator_groups: Vec<ManipulatorGroup<ManipulatorGroupId>>,
 	closed: bool,
 }
 
+#[cfg(feature = "dyn-any")]
+impl<ManipulatorGroupId: crate::Identifier> dyn_any::StaticType for Subpath<ManipulatorGroupId> {
+	type Static = Subpath<ManipulatorGroupId>;
+}
+
 /// Iteration structure for iterating across each curve of a `Subpath`, using an intermediate `Bezier` representation.
 pub struct SubpathIter<'a, ManipulatorGroupId: crate::Identifier> {
 	index: usize,