Add scaffold for stores

src/lib/Summary.svelte

@@ -1,7 +1,14 @@
 <script lang="ts">
+    import { gym, cardio } from "./store";
 </script>
 
-<h1>Summary</h1>
+<div>
+    <h1>Summary</h1>
+    <ul>
+        <li>{$gym.length} gym</li>
+        <li>{$cardio.length} cardio</li>
+    </ul>
+</div>
 
 <style>
 </style>