feat(customizableOverlay): Add customizable overlay info (#3061)

* overlay customization

* custom overlay definition and examples

* minor fix - import statement difference between cornerstone and cornerstone3D

* move "VOI" and "Zoom" calulation to the ViewportOverlay component, make OverlayItem fairly dull

* type specifications

* follow up fixes for CustomizationService changes on upstream

* [fix] various fixes related to custom overlays (formatting, toggling)

* [fix] various fixes related to custom overlays (formatting, toggling)

* right side overlay panels - align right

* [fix] remove "notification" from toggleOverlay command

* comments

* [refactor] remove unused imports

* documentation of customizable overlay configuration

* prettify

* review of documentation of customization service

* fix useCallback() dependencies

* fix useCallback dependencies

* documentation for customization service

* documentation for customization service

platform/core/src/services/CustomizationService/CustomizationService.ts

@@ -161,6 +161,13 @@ export default class CustomizationService extends PubSubService {
     return this.applyType(customization);
   }
 
+  public hasModeCustomization(customizationId: string) {
+    return (
+      this.globalCustomizations[customizationId] ||
+      this.modeCustomizations[customizationId]
+    );
+  }
+
   /** Applies any inheritance due to UI Type customization */
   public applyType(customization: Customization): Customization {
     if (!customization) return customization;