Add to F-Droid

ref: https://f-droid.org/docs/Inclusion_Policy/ reading https://github.com/edave64/ED-Mahjong/blob/884c5aa36f3062ee26f4abc917f6411200f26983/pubspec.yaml#L19 I think flutter 3.7.12 might be good, but fails as https://github.com/tekartik/sqflite/blob/v2.3.0/sqflite/pubspec.yaml needs 3.19.6 Using 3.19.6 fails: ``` BUILD FAILED in 5m 29s Running Gradle task 'assembleRelease'... 330.6s ┌─ Flutter Fix ──────────────────────────────────────────────────────────────────────────────┐ │ [!] Your project requires a newer version of the Kotlin Gradle plugin. │ │ Find the latest version on https://kotlinlang.org/docs/releases.html#release-details, then │ │ update /home/vagrant/build/org.xcvbnm.ed_mahjong/android/build.gradle: │ │ ext.kotlin_version = '<latest-version>' │ └────────────────────────────────────────────────────────────────────────────────────────────┘ Gradle task assembleRelease failed with exit code 1 ``` so, which flutter version? do add folders and files for Fastlane icon, pics, texts: https://gitlab.com/-/snippets/1895688