Added Subpaths to bezier-rs (#730)

* Added Subpath constructor, iterator and length

* Asserted that subpaths of len < 2 cannot be closed. Added len() and comments

* Added subpath to_svg(), made structs public, made quadratic use either in_handle or out_handle

* add bezier handles

* Added basic interactivity and index traits

* Added SubPath interactivity

* Added svg styling

* Broke subpath impl across multiple files. More sylistic changes per review

* Fixed format error

* Added closed subpath to documentation page

* Modified subpath to_svg to use functional style

* Stylistic changes per review

* Fixed build errors

* More sylistic changes per review

* Moved svg commands to constants

* Moved formatting for svg arguments to ToSVGOptions

* Renamed files in git

* Even more stylistic changes per review

bezier-rs/docs/interactive-docs/src/utils/drawing.ts

@@ -7,7 +7,7 @@ export const COLORS = {
 	CANVAS: "white",
 	INTERACTIVE: {
 		STROKE_1: "black",
-		STROKE_2: "grey",
+		STROKE_2: "gray",
 		SELECTED: "blue",
 	},
 	NON_INTERACTIVE: {