feat: [ongeki] data export/import

AquaNet/src/components/settings/OngekiSettings.svelte

@@ -2,8 +2,20 @@
   import { fade } from "svelte/transition";
   import { FADE_IN, FADE_OUT } from "../../libs/config";
   import GameSettingFields from "./GameSettingFields.svelte";
+
+  function exportData() {
+      submitting = "export"
+      GAME.export('ongeki')
+        .then(data => download(JSON.stringify(data), `AquaDX_ongeki_export_${values[0]}.json`))
+        .catch(e => error = e.message)
+        .finally(() => submitting = "")
+    }
 </script>
 
 <div>
   <GameSettingFields game="ongeki"/>
+  <button class="exportButton" on:click={exportData}>
+      <Icon icon="bxs:file-export"/>
+      {t('settings.export')}
+    </button>
 </div>

AquaNet/src/pages/Home/ImportDataAction.svelte

@@ -69,6 +69,8 @@
         return 'mai2';
       case 'SDHD':
         return 'chu3';
+      case 'SDDT':
+        return 'ongeki';
       default:
         throw new Error(t('home.import.unknown-game'));
     }