Added #

• Initial release
• Signal<T> - Core reactive primitive with call syntax
• computed() - Derived signals with auto-dependency tracking
• effect() - Side effects that run on signal changes
• batch() - Batch multiple updates
• FormField<T> - Form field with validation
• FormState - Form group management
• Built-in validators: required, email, minLength, maxLength, min, max, pattern
• Jaspr integration: Watch component