Each plugin for the server version is a folder with files. To use the plugins with the desktop version, you need to pack these files into a single zip archive file (see the Adding plugins section for more information on how to add plugins to the editors).
The plugin folder must contain three files required for the plugin to work:
The plugin folder can also contain other files such as plugin icons, styles, translations, readme, third-party services, etc. More information can be found here.