Add some sidebars and license stuff

src/Components/Utilities.tsx

@@ -0,0 +1,16 @@
+import styled from 'styled-components';
+import {
+  Button as ButtonBase,
+  ToggleButtonGroup as ToggleButtonGroupBase,
+  ToggleButton as ToggleButtonBase,
+} from '@mui/material';
+import { Sidebar } from '@excalidraw/excalidraw';
+
+export const SidebarProvider = styled(Sidebar)``;
+export const SidebarHeader = styled(Sidebar.Header)``;
+
+export const Button = styled(ButtonBase)``;
+
+export const ToggleButtonGroup = styled(ToggleButtonGroupBase)``;
+
+export const ToggleButton = styled(ToggleButtonBase)``;