v0.1.0 of keepass_flutter

Flutter plugin for KeePass KDBX databases; bundles a Rust core via cargokit and re-exports package:keepass. Changelog excerpt: - First publishable release of the Flutter plugin. - Re-exports the full package:keepassDart API (Database, Group, Entry, merge, error types). - cargokit integration builds and bundles libkeepass_flutter_nativefor Android, iOS, Linux, macOS, and Windows so apps load the native code with no manual build step. - State and storage classes that previously lived in lib/src/state/(NativeVaultState, LocalFileStorageProvider) are relocated to the reference example. The plugin itself is now a thin [...]