chore(deps): [BREAKING] Support freezed 3

[JohannSchramm]

Description

This updates the version constraints of freezed and freezed_annotation to support freezed 3.x versions.

Instead of using freezed: ^3.0.0, I opted into using freezed: ">=2.4.7 <4.0.0" to allow using both freezed 3 and freezed 2, as updating to freezed 3 can be quite substantial.

Although it is compatible with freezed 2, the models were generated with freezed 3, so this is a breaking change, as .map/.when are no longer generated, and Sketch is exposed. However updating the codebase to use pattern matching is probably less of a hassle than generally adopting freezed 3 and potentially riverpod 3.

This should also close: #78

Checklist

• My PR title is in the style of conventional commits
• All public facing APIs are documented with dartdoc
• I have added tests to cover my changes

[Copilot]

Pull request overview

This PR updates the freezed dependencies to support version 3.x while maintaining backward compatibility with version 2.4.7+. The models have been regenerated with freezed 3, introducing breaking changes where pattern matching methods (.map/.when) are moved from mixins to extensions, and internal implementation classes are now exposed.

Changes:

• Updated freezed and freezed_annotation version constraints to support both 2.4.7+ and <4.0.0
• Regenerated all freezed models with freezed 3, moving pattern matching methods to extensions
• Added abstract class keyword to freezed model declarations for freezed 3 compatibility

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
pubspec.yaml	Updated version constraints for freezed and freezed_annotation to support 2.4.7+ through 3.x
lib/src/view/state/scribble.state.g.dart	Regenerated JSON serialization code with simplified naming (_$DrawingImpl → Drawing)
lib/src/view/state/scribble.state.freezed.dart	Regenerated freezed code with pattern matching moved to extensions, exposed implementation classes
lib/src/domain/model/sketch_line/sketch_line.dart	Added abstract keyword to class declaration
lib/src/domain/model/sketch_line/sketch_line.g.dart	Regenerated JSON serialization code with simplified naming
lib/src/domain/model/sketch_line/sketch_line.freezed.dart	Regenerated freezed code with pattern matching in extensions
lib/src/domain/model/sketch/sketch.dart	Added abstract keyword to class declaration
lib/src/domain/model/sketch/sketch.g.dart	Regenerated JSON serialization code with simplified naming
lib/src/domain/model/sketch/sketch.freezed.dart	Regenerated freezed code with pattern matching in extensions
lib/src/domain/model/point/point.dart	Added abstract keyword to class declaration
lib/src/domain/model/point/point.g.dart	Regenerated JSON serialization code with simplified naming
lib/src/domain/model/point/point.freezed.dart	Regenerated freezed code with pattern matching in extensions

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