Merge from vscode merge-base (#22780)

* Revert "Revert "Merge from vscode merge-base (#22769)" (#22779)"

This reverts commit 47a1745180.

* Fix notebook download task

* Remove done call from extensions-ci

extensions/ipynb/package.json

@@ -52,6 +52,16 @@
 				"priority": "default"
 			}
 		],
+    "notebookRenderer": [
+      {
+        "id": "vscode.markdown-it-cell-attachment-renderer",
+        "displayName": "Markdown it ipynb Cell Attachment renderer",
+        "entrypoint": {
+          "extends": "vscode.markdown-it-renderer",
+          "path": "./notebook-out/cellAttachmentRenderer.js"
+        }
+      }
+    ],
 		"menus": {
 			"file/newFile": [
 				{
@@ -71,8 +81,9 @@
 		}
 	},
 	"scripts": {
-		"compile": "npx gulp compile-extension:ipynb",
-		"watch": "npx gulp watch-extension:ipynb"
+		"compile": "npx gulp compile-extension:ipynb && npm run build-notebook",
+		"watch": "npx gulp watch-extension:ipynb",
+		"build-notebook": "node ./esbuild"
 	},
 	"dependencies": {
 		"@enonic/fnv-plus": "^1.3.0",
@@ -81,6 +92,7 @@
 	},
 	"devDependencies": {
 		"@jupyterlab/nbformat": "^3.2.9",
+		"@types/markdown-it": "12.2.3",
 		"@types/uuid": "^8.3.1"
 	},
 	"repository": {