Enable semantic features (such as error reporting) in JS/TS notebook cells

extensions/typescript-language-features/src/utils/fileSchemes.ts

@@ -9,11 +9,13 @@ export const git = 'git';
 /** Live share scheme */
 export const vsls = 'vsls';
 export const walkThroughSnippet = 'walkThroughSnippet';
+export const vscodeNotebookCell = 'vscode-notebook-cell';
 
 export const semanticSupportedSchemes = [
 	file,
 	untitled,
 	walkThroughSnippet,
+	vscodeNotebookCell,
 ];
 
 /**