Migrate Filament resource files to Filament 4/5 namespace conventions:
- Forms\Form → Schemas\Schema, Infolists\Infolist → Schemas\Schema
- Forms\Components\Section → Schemas\Components\Section
- Tables\Actions\* → Filament\Actions\* with direct imports
- ->actions() → ->recordActions(), ->bulkActions() → ->toolbarActions()
- Action ->form() → ->schema() for modal forms
- MaxWidth → Width enum
- $navigationIcon type updated to string|BackedEnum|null

Updates composer.json require-dev to filament/filament: ^4.0 || ^5.0.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>