feat(web): Download links and Obtainium link generator on Utilities page and onboarding (#20589)

web/src/lib/components/onboarding-page/onboarding-mobile-app.svelte

@@ -0,0 +1,27 @@
+<script lang="ts">
+  import AppDownloadModal from '$lib/modals/AppDownloadModal.svelte';
+  import ObtainiumConfigModal from '$lib/modals/ObtainiumConfigModal.svelte';
+  import { Button, HStack, modalManager } from '@immich/ui';
+  import { mdiCellphoneArrowDownVariant, mdiLinkEdit } from '@mdi/js';
+  import { t } from 'svelte-i18n';
+</script>
+
+<HStack wrap>
+  <Button
+    size="large"
+    shape="semi-round"
+    onclick={() => modalManager.show(ObtainiumConfigModal, {})}
+    leadingIcon={mdiLinkEdit}
+  >
+    {$t('obtainium_configurator')}
+  </Button>
+  <Button
+    size="large"
+    shape="semi-round"
+    onclick={() => modalManager.show(AppDownloadModal, {})}
+    leadingIcon={mdiCellphoneArrowDownVariant}
+  >
+    {$t('app_download_links')}
+  </Button>
+</HStack>
+<p>{$t('mobile_app_download_onboarding_note')}</p>