add all frontend files

node_modules/rc-table/es/sugar/ColumnGroup.d.ts

@@ -0,0 +1,12 @@
+import type * as React from 'react';
+import type { ColumnProps } from './Column';
+import type { ColumnType } from '../interface';
+export interface ColumnGroupProps<RecordType> extends Omit<ColumnType<RecordType>, 'children'> {
+    children: React.ReactElement<ColumnProps<RecordType>> | readonly React.ReactElement<ColumnProps<RecordType>>[];
+}
+/**
+ * This is a syntactic sugar for `columns` prop.
+ * So HOC will not work on this.
+ */
+declare function ColumnGroup<RecordType>(_: ColumnGroupProps<RecordType>): any;
+export default ColumnGroup;