Add graph icons to OE and TD (#18808)

* add graph icons to OE and TD

* PR comments

* change enum type

* change sub type to icon and make basic as default

* changed icontype to icon

* change default logic location

* change icon name to be more generic

* use right icons

src/sql/azdata.proposed.d.ts

@@ -743,6 +743,11 @@ declare module 'azdata' {
 			 * Extension can store additional information that the provider needs to uniquely identify a table.
 			 */
 			[key: string]: any;
+			/**
+			 * Table icon type that's shown in the editor tab. Default is the basic
+			 * table icon.
+			 */
+			tableIcon?: TableIcon;
 		}
 
 		/**
@@ -759,6 +764,16 @@ declare module 'azdata' {
 			viewModel: DesignerViewModel;
 		}
 
+		/**
+		 * Table icon that's shown on the editor tab
+		 */
+		export enum TableIcon {
+			Basic = 'Basic',
+			Temporal = 'Temporal',
+			GraphNode = 'GraphNode',
+			GraphEdge = 'GraphEdge'
+		}
+
 		/**
 		 * Name of the common table properties.
 		 * Extensions can use the names to access the designer view model.