add all frontend files

node_modules/rc-dialog/es/Dialog/Mask.js

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+import _extends from "@babel/runtime/helpers/esm/extends";
+import _objectSpread from "@babel/runtime/helpers/esm/objectSpread2";
+import * as React from 'react';
+import classNames from 'classnames';
+import CSSMotion from 'rc-motion';
+var Mask = function Mask(props) {
+  var prefixCls = props.prefixCls,
+    style = props.style,
+    visible = props.visible,
+    maskProps = props.maskProps,
+    motionName = props.motionName,
+    className = props.className;
+  return /*#__PURE__*/React.createElement(CSSMotion, {
+    key: "mask",
+    visible: visible,
+    motionName: motionName,
+    leavedClassName: "".concat(prefixCls, "-mask-hidden")
+  }, function (_ref, ref) {
+    var motionClassName = _ref.className,
+      motionStyle = _ref.style;
+    return /*#__PURE__*/React.createElement("div", _extends({
+      ref: ref,
+      style: _objectSpread(_objectSpread({}, motionStyle), style),
+      className: classNames("".concat(prefixCls, "-mask"), motionClassName, className)
+    }, maskProps));
+  });
+};
+export default Mask;