refactor: Update ComponentsPanel and SelectedItemsDetailInputComponent for improved functionality

- Updated ComponentsPanel to clarify the usage of the "selected-items-detail-input" component, indicating its application in the context of adding items for clients.
- Enhanced SelectedItemsDetailInputComponent by introducing independent editing states for group entries, allowing for better management of item edits within groups.
- Adjusted input field heights and styles for consistency and improved user experience.
- Added a new property `maxEntries` to the FieldGroup interface to support 1:1 relationships and automatic entry generation.
- Implemented overflow support for the component to handle cases with many items, ensuring a smoother user interface.

frontend/components/screen/panels/ComponentsPanel.tsx

@@ -109,8 +109,8 @@ export function ComponentsPanel({
       "v2-media", // → 테이블 컬럼의 image/file 입력 타입으로 사용
       // 플로우 위젯 숨김 처리
       "flow-widget",
-      // 선택 항목 상세입력 - 기존 컴포넌트 조합으로 대체 가능
-      "selected-items-detail-input",
+      // 선택 항목 상세입력 - 거래처 품목 추가 등에서 사용
+      // "selected-items-detail-input",
       // 연관 데이터 버튼 - v2-repeater로 대체 가능
       "related-data-buttons",
       // ===== V2로 대체된 기존 컴포넌트 (v2 버전만 사용) =====