refactor(frontend): rename pages to settings (#2083)

# Motivation

Not sure why the folder that contains the settings related components,
and solely those components, is named `pages`. Feels like `settings`
would make more sense here.

# Changes

- Rename `pages` to `settings`.

src/frontend/src/lib/components/settings/Settings.svelte

@@ -0,0 +1,14 @@
+<script>
+	import { authSignedIn } from '$lib/derived/auth.derived';
+	import SettingsSignedIn from '$lib/components/settings/SettingsSignedIn.svelte';
+	import SettingsSignedOut from '$lib/components/settings/SettingsSignedOut.svelte';
+	import SettingsVersion from '$lib/components/settings/SettingsVersion.svelte';
+</script>
+
+{#if $authSignedIn}
+	<SettingsSignedIn />
+{:else}
+	<SettingsSignedOut />
+{/if}
+
+<SettingsVersion />

src/frontend/src/routes/(app)/settings/+page.svelte

@@ -1,5 +1,5 @@
 <script lang="ts">
-	import Settings from '$lib/components/pages/Settings.svelte';
+	import Settings from '$lib/components/settings/Settings.svelte';
 	import { i18n } from '$lib/stores/i18n.store';
 </script>