add admin tools

src/app/admin/tools/AccountUuidFinder.svelte

@@ -0,0 +1,29 @@
+<script lang="ts">
+  import Input from '@components/input/Input.svelte';
+  import Select from '@components/input/Select.svelte';
+  import { uuidFromUsername } from '@app/admin/tools/tools.ts';
+
+  // states
+  let edition = $state<'java' | 'bedrock'>('java');
+  let username = $state('');
+  let uuid = $state<null | string>(null);
+
+  // callbacks
+  async function onSubmit() {
+    uuid = await uuidFromUsername(edition, username);
+  }
+</script>
+
+<fieldset class="fieldset border border-base-200 rounded-box px-4">
+  <legend class="fieldset-legend">Account UUID finder</legend>
+  <div>
+    <div class="flex gap-3">
+      <Input bind:value={username} />
+      <Select bind:value={edition} values={{ java: 'Java', bedrock: 'Bedrock' }} />
+    </div>
+    <div class="flex justify-center">
+      <button class="btn w-4/6" class:disabled={!username} onclick={onSubmit}>UUID finden</button>
+    </div>
+    <Input bind:value={uuid} readonly />
+  </div>
+</fieldset>