adding in mui and getting rid of other styling

packages/desktop/src/tree/Terminal.tsx

@@ -0,0 +1,21 @@
+import { Grid } from '@mui/material';
+import React from 'react';
+
+export default function Terminal() {
+  return (
+    <Grid container spacing={0}>
+      <Grid item xs={4}>
+        This is the sidepanel
+      </Grid>
+
+      <Grid item xs={8}>
+        {' '}
+        main panel
+      </Grid>
+
+      <Grid item xs={12}>
+        This is the footer controls
+      </Grid>
+    </Grid>
+  );
+}