Auto create theme names for app.ini file

[JokingChicken]

Right now i have to type out the theme names in the app.ini file.

Is it possable to auto generate a list of all the names on build? This way i can just copy the names list and add all the themes in one go!

POC here: auto-create-themelist

Todo:

• [x] decide if this is needed
• [x] decide if we need the list to be automatically updated on build (i like automation)
• [x] decide if the list goes in the README.md file that we update on build