chore: bump Flutter dependencies to latest versions

[offich]

Description

Bumps Flutter-related packages to their latest versions.

What was done

• cupertino_icons: 1.0.8 → 1.0.9
• devtools_app_shared: 0.3.1 → 0.5.0
• devtools_extensions: 0.3.1 → 0.5.0
• flutter_hooks: 0.21.2 → 0.21.3+1
• syncfusion_flutter_sliders: 28.2.7 → 33.2.4
• syncfusion_flutter_core: 28.2.7 → 33.2.4
• flutter_lints (dev): 5.0.0 → 6.0.0
• pana (dev): 0.22.18 → 0.23.11

What was NOT done

• Updating the package's own version number in pubspec.yaml
• Handling breaking changes (separate verification needed)

Operation Confirmation

Prerequisites & Steps

1. Run fvm flutter pub get
2. Confirm no errors with flutter analyze lib test
3. Verify in Chrome: fvm flutter run -d chrome --dart-define=use_simulated_environment=true

Notes & Related URLs

N/A