Split LGraphCanvas out to TS file

Fixes circular dependency

src/LGraph.ts

@@ -1,5 +1,6 @@
 // @ts-nocheck
-import { LiteGraph, LGraphCanvas } from "./litegraph";
+import { LiteGraph } from "./litegraph";
+import { LGraphCanvas } from "./LGraphCanvas";
 import { LGraphGroup } from "./LGraphGroup";
 import { LGraphNode } from "./LGraphNode";
 import { LLink } from "./LLink";

src/LGraphGroup.ts

@@ -1,5 +1,6 @@
 // @ts-nocheck
-import { LiteGraph, LGraphCanvas } from "./litegraph";
+import { LiteGraph } from "./litegraph";
+import { LGraphCanvas } from "./LGraphCanvas";
 import { overlapBounding } from "./LiteGraphGlobal";
 
 

src/LiteGraphGlobal.ts

@@ -50,6 +50,8 @@ export class LiteGraphGlobal {
     WIDGET_SECONDARY_TEXT_COLOR = "#999";
 
     LINK_COLOR = "#9A9";
+    // TODO: This is a workaround until LGraphCanvas.link_type_colors is no longer static.
+    static DEFAULT_EVENT_LINK_COLOR = "#A86";
     EVENT_LINK_COLOR = "#A86";
     CONNECTING_LINK_COLOR = "#AFA";