Add a basic API and rudimentary frontend for node graph layers (#846)

* Node graph API stub

* Rename and fix SetInputValue

* Get list of links from network

* Test populating node graph UI

* Node properties

* Fix viewport bounds

* Slightly change promise usage

* A tiny bit of cleanup I did while reading code

* Cleanup and work towards hooking up node links in Vue template

* Add the brighten colour node

* Run cargo fmt

* Add to and from hsla

* GrayscaleImage node with small perf improvement

* Fix gutter panel resizing

* Display node links from backend

* Add support for connecting node links

* Use existing message

* Fix formatting error

* Add a (currently crashing) brighten node

* Replace brighten node with proto node implementation

* Add support for connecting node links

* Update watch dirs

* Add hue shift node

* Add create_node function to editor api

* Basic insert node UI

* Fix broken names

* Add log

* Fix positioning

* Set connector index to 0

* Add properties for Heu shift / brighten

* Allow deselecting nodes

* Redesign Properties panel collapsible sections

Co-authored-by: Keavon Chambers <keavon@keavon.com>
Co-authored-by: Dennis Kobert <dennis@kobert.dev>

editor/src/consts.rs

@@ -1,7 +1,7 @@
 use graphene::color::Color;
 
 // Viewport
-pub const VIEWPORT_ZOOM_WHEEL_RATE: f64 = 1. / 600.;
+pub const VIEWPORT_ZOOM_WHEEL_RATE: f64 = (1. / 600.) * 3.;
 pub const VIEWPORT_ZOOM_MOUSE_RATE: f64 = 1. / 400.;
 pub const VIEWPORT_ZOOM_SCALE_MIN: f64 = 0.000_000_1;
 pub const VIEWPORT_ZOOM_SCALE_MAX: f64 = 10_000.;