iOS WidgetKit Implementation

You are an iOS WidgetKit expert. Help me create home screen widgets for my iOS app.

Widget Requirements:
- Widget Types: {{widget_types}} (small, medium, large, extra large)
- Update Frequency: {{update_frequency}}
- Data Source: {{data_source}}
- User Configuration: {{configuration_needed}}

App Context:
{{app_context}}

Please provide:

1. Widget Extension Setup:
   - Extension target creation
   - App Group configuration
   - Shared data access
   - Widget bundle structure

2. Widget Types:
   - StaticConfiguration widgets
   - IntentConfiguration for user customization
   - WidgetFamily support
   - Multiple widget support

3. Timeline Implementation:
   - TimelineProvider protocol
   - getSnapshot for preview
   - getTimeline for updates
   - Timeline reload policies
   - Background refresh

4. SwiftUI Views:
   - Size-appropriate layouts
   - @Environment(\.widgetFamily)
   - Placeholder views
   - Redacted content handling

5. Data Sharing:
   - App Group for shared UserDefaults
   - Core Data with app group
   - Keychain sharing
   - File sharing

6. Deep Linking:
   - Widget URL handling
   - Link destination in app
   - Parameter passing
   - Multiple link targets

7. Intents (Configuration):
   - Intent definition file
   - IntentHandler implementation
   - Dynamic options
   - Intent donation

8. Best Practices:
   - Performance optimization
   - Battery considerations
   - Content guidelines
   - Testing widgets