message: Fix Scan newcommands for intellisense
  We add the definition of the (re)newcommands to the intellisense
  suggestions until they are used. Once used, we can infer the parameters
  and improve intellisense using the automatic discovery of commands.
diff: @@ -92,6 +92,14 @@ export class Command {
  suggestions[key] = this.entryToCompletionItem(items[key])
  })
  }
  + Object.keys(this.newcommandData).forEach(key => {
  + if (key in suggestions) {
  + return
  + }
  + const item = new vscode.CompletionItem(`\\${key}`, vscode.CompletionItemKind.Function)
  + item.insertText = key
  + suggestions[key] = item
  + })
  this.suggestions = Object.keys(suggestions).map(key => suggestions[key])
  return this.suggestions
  }
  