v6.3.0 of flutter_archive

Create and extract ZIP archive files in Android, iOS and macOS. Zip all files in a directory recursively or a given list of files. Changelog excerpt: - [iOS] Raised declared deployment target to 13.0 to match the minimum already required by Flutter 3.44+ - [macOS] Raised declared deployment target to 10.15 to match Flutter's current minimum - [Android] Bumped Kotlin to 2.3.20, raised minSdk to 24, and modernized the lint/test configuration - [Example] Migrated the Android example to Kotlin DSL + AGP 9 / built-in Kotlin