Extract Duplicated Code to Utils

Move duplicated utility functions to centralized utils modules to improve code maintainability and reduce duplication

1. String Conversion Functions (15+ occurrences)

- Pattern: ->Int.toString, ->Float.toString
- Files: CardLoader, CustomPicker, DynamicFields, Pager, TabView,
etc.

2. Card Validation Functions (10+ occurrences)

- Pattern: clearSpaces, getCardBrand, cardType
- Files: CardElement, CardFormUi, PaymentSheetUi,
RequiredFieldsTypes, etc.
- Current: Scattered across multiple files

3. JSON Helper Functions

- Pattern: Similar to existing Utils.res functions (getProp,
getString, getBool)
- Current: Some duplication in different files