launch Indonesian on f-droid.org

https://hosted.weblate.org/languages/id/f-droid/

Here are the final things left to do before we can launch Indonesian on f-droid.org:

• client app 100% translated
• core web pages in website pages 100% translated
• 10 apps in fdroiddata 100% translated
• "chrome" strings 100% translated
• translator approval of current state: https://staging.f-droid.org/id/
• merge request with blog post announcing launch (for example, Romanian )

ping @Linerly because you've contributed to the Indonesian translation before.