Merge pull request '그리드 테이블 경계표시 추가' (#14) from feature/ysCha into dev

Reviewed-on: #14

src/styles/_grid-detail.scss

@@ -24,6 +24,10 @@
         .ag-header-cell{
             font-size: 13px;
             color: #fff;
+            border-right: 1px solid #738596;
+            &:last-child{
+                border: none;
+            }
         }
         .ag-header-cell-label{
             justify-content: center;