Update build scripts and change notice date format

- Add build-dev target for development environment
- Fix zip output paths to use relative paths in build directory
- Change home notice date format from 'YY년 MM월 DD일' to 'YYYY.MM.DD'

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/entities/home/ui/home-notice-item.tsx

@@ -29,7 +29,7 @@ export const HomeNoticeItem = ({
       >
         <div className="notice-content">
           <div className="notice-title">{ noticeItem.title }</div>
-          <div className="notice-meta">{ t(`support.notice.categories.${noticeItem.informCl}`) }<span>{ noticeItem.regDt? moment(noticeItem.regDt).format('YY년 MM월 DD일'): '' }</span></div>
+          <div className="notice-meta">{ t(`support.notice.categories.${noticeItem.informCl}`) }<span>{ noticeItem.regDt? moment(noticeItem.regDt).format('YYYY.MM.DD'): '' }</span></div>
         </div>
         <div className="notice-arrow">
           <img