Bump flutter and dependencies versions, moved test folder

[nestorsgarzonc]

Description

Refactor modal sheet layout and type constructors for improved readability and consistency

• Updated WoltModalSheetLayout to use super.key in constructor.
• Refactored WoltBottomSheetType, WoltDialogType, and WoltSideSheetType constructors to utilize super for parameters.
• Simplified WoltAnimatedModalBarrier and WoltStickyActionBarWrapper constructors by using super.key.
• Modified WoltModalSheetRoute to use super.settings in constructor.
• Removed library name in wolt_modal_sheet.dart for cleaner export.
• Updated dependency injector to use super.key and super.child.
• Updated pubspec.yaml files for wolt_di and wolt_state_management to reflect new SDK and Flutter versions, and updated dev dependencies.
• Added comprehensive tests for StatefulValueNotifier and ValueState classes to ensure correct behavior across various states and transitions.
• Added new test files for stateful value notifier and value state to enhance test coverage.

Related Issues

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• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• My PR includes tests for all changed/updated/fixed behaviors.
• All existing and new tests are passing.
• I updated/added relevant documentation (doc comments with ///).
• The analyzer (melos run analyze) does not report any problems on my PR.
• The package compiles with the minimum Flutter version stated in the pubspec.yaml

Breaking Change

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• Yes, this is a breaking change.
• No, this is not a breaking change.