chore: upgrade flutter and dependencies

[arnon-aroon]

Upgrade Flutter and dependencies

This commit upgrades the project to a newer Flutter version and updates various dependencies.

Dependency Updates:

• Bumps flutter_hooks to ^0.21.3+1
• Bumps provider to ^6.1.5+1
• Bumps flutter_lints to ^6.0.0
• Bumps cupertino_icons to ^1.0.8
• Bumps mockito to ^5.5.0

Android:

• Upgrades Gradle to version 8.14.1.
• Refactors settings.gradle to use the modern plugin management block.
• Removes the top-level buildscript block from build.gradle.
• Updates app/build.gradle to use the plugins block and adds the namespace.

iOS:

• Sets the iOS deployment target to 13.0.
• Updates Xcode project settings (project.pbxproj) and scheme files.
• Uses @main attribute instead of @UIApplicationMain in AppDelegate.swift.

General:

• Adds .build/ and .swiftpm/ to the example's .gitignore.
• Updates generated mock files to match new dependency versions.
• Passes super.key in StackedHookView and HookViewModelWidget constructors.

[arnon-aroon]

@FilledStacks

[FilledStacks]

Awesome, thanks!

I'm running the CI now then will merge if it passes 🚀

[FilledStacks]

🚀