[styles] utils, focused 추가

Detail Notes :

1. focused 상태의 변수 추가

com.twin.app.shoptime/src/style/utils.module.less

@@ -6,6 +6,14 @@
   flex-direction: @direction;
 }
 
+.focused(@boxShadow: 0px, @borderRadius: 0px) {
+  .position(@position: absolute, @top: 0, @left: 0, @right: 0, @bottom: 0);
+  border: 4px solid @PRIMARY_COLOR_RED;
+  box-shadow: 0 0 @boxShadow 0 rgba(0, 0, 0, 0.5);
+  border-radius: @borderRadius;
+  content: "";
+}
+
 .size(@w: 50px, @h: 50px) {
   width: @w;
   height: @h;