Collapse Debug tools by default

src/Debugger.svelte

@@ -40,7 +40,9 @@
 </script>
 
 <div>
-  <h3>Dialog-Debugger</h3>
+  <details>
+      <summary>Show debug tools</summary>
+      <h3>Dialog-Debugger</h3>
   Jump to dialog:
   <!-- svelte-ignore a11y-no-onchange -->
   <select
@@ -96,6 +98,7 @@
   <button style="width: 13rem;" on:click={() => gameFactsStore.set([])}
     >Reset facts</button
   >
+  </details>
 </div>
 
 <style>