feat: Introduce new date picker components for enhanced date selection

- Added `FormDatePicker` and `InlineCellDatePicker` components to provide flexible date selection options.
- Implemented a modernized date picker interface with calendar navigation, year selection, and time input capabilities.
- Enhanced `DateWidget` to support both date and datetime formats, improving user experience in date handling.
- Updated `CategoryColumnList` to group columns dynamically and manage expanded states for better organization.
- Improved `AlertDialog` z-index for better visibility in modal interactions.
- Refactored `ScreenModal` to ensure consistent modal behavior across the application.

frontend/components/common/ScreenModal.tsx

@@ -1288,7 +1288,7 @@ export const ScreenModal: React.FC<ScreenModalProps> = ({ className }) => {
 
       {/* 모달 닫기 확인 다이얼로그 */}
       <AlertDialog open={showCloseConfirm} onOpenChange={setShowCloseConfirm}>
-        <AlertDialogContent className="!z-[1100] max-w-[95vw] sm:max-w-[400px]">
+        <AlertDialogContent className="max-w-[95vw] sm:max-w-[400px]">
           <AlertDialogHeader>
             <AlertDialogTitle className="text-base sm:text-lg">
               화면을 닫으시겠습니까?