feat: Expose toggleCalendarPosition function using forwardRef

[jsh3418]

Description

• Implemented forwardRef to expose the toggleCalendarPosition function
• Added useImperativeHandle hook to make the function accessible from parent components
• Enables programmatic control of calendar expansion/collapse

Changes

• Wrapped component with forwardRef
• Exposed toggleCalendarPosition through useImperativeHandle

Usage Example

const calendarRef = useRef();
// Toggle calendar position programmatically
calendarRef.current.toggleCalendarPosition();

Result