feat: add electron app.

website/src/commands/css.tsx

@@ -0,0 +1,27 @@
+import { NavLink } from 'react-router-dom';
+import { ICommand } from '@uiw/react-markdown-editor';
+import styled from 'styled-components';
+
+const Link = styled(NavLink)`
+  font-size: 0.8rem;
+  line-height: 0.8rem;
+  text-decoration: none;
+  padding: 0.18rem 0.3rem;
+  &:hover {
+    color: var(--color-accent-fg);
+    background-color: var(--color-neutral-muted);
+    border-radius: 0.2rem;
+  }
+`;
+
+export const cssCommand: ICommand = {
+  name: 'previewTtheme',
+  keyCommand: 'previewTtheme',
+  button: () => <Link to="/editor/theme">编辑主题</Link>,
+};
+
+export const previousCommand: ICommand = {
+  name: 'previous',
+  keyCommand: 'previous',
+  button: () => <Link to="/">返回</Link>,
+};