Fix Imaginate by porting its JS roundtrip code to graph-based async execution in Rust (#1250)

* Create asynchronous rust imaginate node

* Make a first imaginate request via rust

* Implement parsing of imaginate API result image

* Stop refresh timer from affecting imaginate progress requests

* Add cargo-about clarification for rustls-webpki

* Delete imaginate.ts and all uses of its functions

* Add imaginate img2img feature

* Fix imaginate random seed button

* Fix imaginate ui inferring non-custom resolutions

* Fix the imaginate progress indicator

* Remove ImaginatePreferences from being compiled into node graph

* Regenerate imaginate only when hitting button

* Add ability to terminate imaginate requests

* Add imaginate server check feature

* Do not compile wasm_bindgen bindings in graphite_editor for tests

* Address some review suggestions

- move wasm futures dependency in editor to the future-executor crate
- guard wasm-bindgen in editor behind a `wasm` feature flag
- dont make seed number input a slider
- remove poll_server_check from process_message function beginning
- guard wasm related code behind `cfg(target_arch = "wasm32")` instead
  of `cfg(test)`
- Call the imaginate idle states "Ready" and "Done" instead of "Nothing
  to do"
- Call the imaginate uploading state "Uploading Image" instead of
  "Uploading Input Image"
- Remove the EvalSyncNode

* Fix imaginate host name being restored between graphite instances

also change the progress status texts a bit.

---------

Co-authored-by: Keavon Chambers <keavon@keavon.com>

node-graph/gcore/src/application_io.rs

@@ -112,10 +112,25 @@ impl<T: ApplicationIo> ApplicationIo for &T {
 	}
 }
 
+#[derive(Debug, Clone)]
+pub enum NodeGraphUpdateMessage {
+	ImaginateStatusUpdate,
+}
+
+pub trait NodeGraphUpdateSender {
+	fn send(&self, message: NodeGraphUpdateMessage);
+}
+
+pub trait GetImaginatePreferences {
+	fn get_host_name(&self) -> &str;
+}
+
 pub struct EditorApi<'a, Io> {
 	pub image_frame: Option<ImageFrame<Color>>,
 	pub font_cache: &'a FontCache,
 	pub application_io: &'a Io,
+	pub node_graph_message_sender: &'a dyn NodeGraphUpdateSender,
+	pub imaginate_preferences: &'a dyn GetImaginatePreferences,
 }
 
 impl<'a, Io> Clone for EditorApi<'a, Io> {
@@ -124,6 +139,8 @@ impl<'a, Io> Clone for EditorApi<'a, Io> {
 			image_frame: self.image_frame.clone(),
 			font_cache: self.font_cache,
 			application_io: self.application_io,
+			node_graph_message_sender: self.node_graph_message_sender,
+			imaginate_preferences: self.imaginate_preferences,
 		}
 	}
 }