fix: analysis warning

[akaboshinit]

This pull request includes various improvements and refactorings across multiple files in the project. The changes focus on adding const constructors, using ColoredBox instead of Container, and ensuring consistent import ordering.

Improvements and Refactoring:

• Const Constructors and Widgets:

  • Added const constructors and const widgets in examples/generator_app/lib/bar/bar.dart, examples/generator_app/lib/bar/bar.story.dart, examples/generator_app/lib/foo/foo_widget.story.dart, examples/generator_app/lib/image/asset_image.story.dart, examples/generator_app/lib/page/page.story.dart, and examples/generator_app/test/snapshot_test.dart. [1] [2] [3] [4] [5] [6] [7] [8]

• ColoredBox Usage:

  • Replaced Container with ColoredBox in examples/generator_app/lib/bar/bar.dart and examples/simple_app/lib/bar/bar.dart to improve performance when only a color is needed.

• Import Ordering and Cleanup:

  • Organized and cleaned up imports in examples/generator_app/lib/bar/bar.story.dart, examples/simple_app/lib/page/page.story.dart, and examples/simple_app/lib/scrollable/scrollable.story.dart. [1] [2] [3]

• Ignoring Linter Rules:

  • Added // ignore_for_file: camel_case_types comment in examples/generator_app/lib/foo/foo_widget.story.dart and examples/simple_app/lib/foo/foo_widget.story.dart. [1] [2]

• Analysis Options:

  • Updated analysis_options.yaml to exclude generated_playbook.dart from analysis.

[KyoheiG3]

thx