feat: add hidden member list

frontend/src/routes/settings/members/+page.svelte

@@ -0,0 +1,31 @@
+<script lang="ts">
+  import type { Member } from "$lib/api/entities";
+  import { Alert, ListGroup, ListGroupItem } from "sveltestrap";
+  import type { PageData } from "./$types";
+
+  export let data: PageData;
+
+  let members: Member[];
+  $: members = data.user.list_private ? data.members : data.members.filter((m) => m.unlisted);
+</script>
+
+<h1>Hidden members ({members.length})</h1>
+
+{#if data.user.list_private}
+  <Alert color="secondary" fade={false}>
+    Note that your member list is hidden, so <em>all</em> of your members are shown here.
+  </Alert>
+{/if}
+
+{#if members.length > 0}
+  <ListGroup>
+    {#each members as member}
+      <ListGroupItem tag="a" href="/@{data.user.name}/{member.name}">
+        <strong>{member.display_name ?? member.name}</strong>
+        <span class="text-body-secondary">({member.name})</span>
+      </ListGroupItem>
+    {/each}
+  </ListGroup>
+{:else}
+  <Alert color="secondary" fade={false}>You have no unlisted members!</Alert>
+{/if}