refactor: less to scss

yudao-ui-admin-vue3/src/styles/theme.scss

@@ -0,0 +1,6 @@
+// .text-color {
+//   color: var(--el-text-color-regular);
+// }
+// .dark .dark\:text-color {
+//   color: rgba(255, 255, 255, var(--dark-text-color));
+// }