refactor(splash) : Adjusted splash page and utilized flutter hooks

[breadoncee]

No description provided.

[breadoncee]

@gemini-code-assist review this

[gemini-code-assist]

Code Review

This pull request is a great refactoring of the splash screen. It successfully transitions from a StatefulWidget to a HookWidget, which simplifies the code and improves its structure by extracting logic into a custom hook. The file organization has also been improved by moving splash-related files into a dedicated directory. I have a couple of minor suggestions to further enhance the code quality and align with best practices.

[gemini-code-assist]

It's a Flutter best practice to include super.key in widget constructors. This allows the framework to efficiently update and identify widgets. Please add it to the _StackedBoxes constructor.

Suggested change

	const _StackedBoxes();
	const _StackedBoxes({super.key});

[gemini-code-assist]

The checkFirstInstall function is defined inside the useSplashPage hook, which means it gets recreated on every render. For better performance and code organization, this function should be extracted into a private top-level function within this file (e.g., _checkFirstInstall).

Example:

part of 'splash.dart';

double useSplashPage() {
  final context = useContext();
  // ... other hooks

  useEffect(() {
    WidgetsBinding.instance.addPostFrameCallback((_) async {
      await _checkFirstInstall(context);
    });
    return null;
  }, []);

  return breathe;
}

Future<void> _checkFirstInstall(BuildContext context) async {
  // ... implementation
}