feat: Enhance demo components with new input types and layout options

- Added dropdown and radio input components to the demo for application settings.
- Introduced horizontal layout for display preferences and notification settings.
- Implemented checkbox demo with programmatic selection and clear functionality.
- Created file upload and quantity selector demos with various states and configurations.
- Added comprehensive radio input demo showcasing group behavior and various states.
- Developed text input demo with validation states and advanced features like password visibility.
- Introduced a new panel component for better content organization in demos.

readme.plan.md

@@ -133,7 +133,7 @@ Introduce CSS variables for consistent spacing:
 
 1. Phase 1: Create DeesInputBase class and update dees-input-text ✅
 2. Phase 2: Update remaining input components ✅
-3. Phase 3: Update documentation and examples
+3. Phase 3: Update documentation and examples ✅
 4. Phase 4: Testing and refinement ✅
 
 ## Implementation Status
@@ -152,6 +152,12 @@ Introduce CSS variables for consistent spacing:
    - `dees-input-dropdown`: Now extends DeesInputBase, uses dees-label
    - `dees-input-checkbox`: Now extends DeesInputBase, uses dees-label (default label position: right)
    - `dees-input-radio`: Now extends DeesInputBase, uses dees-label (default label position: right)
+   - `dees-input-phone`: Now extends DeesInputBase with phone formatting functionality
+   - `dees-input-iban`: Now extends DeesInputBase with IBAN validation
+   - `dees-input-quantityselector`: Now extends DeesInputBase
+   - `dees-input-multitoggle`: Now extends DeesInputBase with value property for forms
+   - `dees-input-typelist`: Now extends DeesInputBase
+   - `dees-input-fileupload`: Now extends DeesInputBase, uses dees-label
 
 3. **Updated dees-form**:
    - Added `horizontal-layout` property
@@ -162,6 +168,10 @@ Introduce CSS variables for consistent spacing:
    - Added value property to dropdown for form compatibility
    - Fixed changeSubject typing
    - Updated form value type to include dropdown options
+   - Fixed firstUpdated method signatures (phone, iban, fileupload)
+   - Fixed CSS-in-JS errors in quantityselector (removed dynamic references)
+   - Added value property to multitoggle for form compatibility
+   - Removed duplicate properties in fileupload (label, key, disabled, required)
 
 ### Result:
 
@@ -171,4 +181,33 @@ All input components now have:
 - No margin on last child
 - Consistent label handling via dees-label
 - Flexible layout modes
-- Better alignment in flexbox containers
+- Better alignment in flexbox containers
+
+## Demo Improvements
+
+### Created external demo files:
+1. **dees-input-text.demo.ts**: Comprehensive demos showing:
+   - Basic text inputs with descriptions
+   - Horizontal layout examples
+   - Label position variations
+   - Validation states
+   - Password input features
+
+2. **dees-input-checkbox.demo.ts**: Interactive demos featuring:
+   - Basic checkbox usage
+   - Horizontal layout groups
+   - Feature selection with batch operations
+   - Real-world examples
+
+3. **dees-input-radio.demo.ts**: Radio button demos including:
+   - Radio groups with proper behavior
+   - Horizontal yes/no questions
+   - Survey-style layouts
+   - Settings examples
+
+### Updated existing demos:
+1. **dees-input-dropdown.demo.ts**: Enhanced with dees-demowrapper and comprehensive examples
+2. **dees-form.demo.ts**: Added horizontal form layout examples and advanced form features
+3. **dees-simple-appdash.demo.ts**: Enhanced settings view with horizontal forms and radio groups
+
+All demos now use the `dees-demowrapper` component for consistency and include proper styling for light/dark themes.