fix: consider showing the document in external programs a sucess

Showing external programs should be considered a success, which aligns with the original API.

Author: aminya

lib/adapters/show-document-adapter.ts

@@ -35,7 +35,7 @@ export default class ShowDocumentAdapter {
     } else {
       // open using Electron
       shell.openExternal(params.uri, { activate: params.takeFocus })
-      return { success: false }
+      return { success: true }
     }
   }
 }