Move new ui to ui directory

ui/src/routes/grades/[promo].svelte

@@ -0,0 +1,17 @@
+<script context="module">
+ export async function load({ params }) {
+     return {
+         props: {
+             promo: params.promo,
+         }
+     };
+ }
+</script>
+
+<script>
+ import StudentGrades from '../../components/StudentGrades.svelte';
+
+ export let promo;
+</script>
+
+<StudentGrades {promo} />

ui/src/routes/grades/index.svelte

@@ -0,0 +1,5 @@
+<script>
+ import StudentGrades from '../../components/StudentGrades.svelte';
+</script>
+
+<StudentGrades />