You can use the these editor scripts in your own project by adding this project as a Defold library dependency. Open your game.project file and in the dependencies field under project add:
https://github.com/Jerakin/editor-script-components/archive/master.zip
This script adds a few menu items, which shows up depends on the type of file selected. They all create a new resource depending on your selection. A wav or ogg creates a sound component, a json will create a spine scene and a spine scene a spine model.
If you want to create atlases I recommend using https://github.com/Jerakin/editor-script-atlas
$.wav => $.sound
$.ogg => $.sound
$.json and $.atlas => $.spinescene
$.spinescene => $.spinemodel
$.dae => $.model