fassets 0.0.1

Generate type-safe Dart constants from Flutter asset directories.

0.0.1

• Initial release.
• Generate type-safe Dart constant classes from Flutter asset directories.
• Incremental regeneration — only appends new constants, never removes.
• Barrel file (index.dart) auto-generated with sorted exports.
• --folder flag to target a specific asset subtree.
• --output flag for custom output directory.
• Validates asset paths against pubspec.yaml.
• Handles edge cases: missing folders, empty folders, undeclared paths.