Create jobs for released versions

Todos:

• Create release keys
• Run only for tags

metadata/preview.template.yml

+Categories:
+  - Multimedia
+  - Funkwhale
+License: MIT
+AuthorName: Funkwhale Collective
+WebSite: https://funkwhale.audio
+SourceCode: https://dev.funkwhale.audio/funkwhale/funkwhale-android/
+IssueTracker: https://dev.funkwhale.audio/funkwhale/funkwhale-android/-/issues
+Translation: https://translate.funkwhale.audio/projects/funkwhale/ffa/
+
+Name: Funkwhale (preview)
+Summary: This is the development version of the official Funkwhale App for Android.
+
+AutoUpdateMode: None
+UpdateCheckMode: Tags
+UpdateCheckData: output-metadata.json|"version_code":.*"(.*)"|output-metadata.json|"versionName":.*\"(.*)\",
+CurrentVersion: $versionCode
+