Translate some strings on home page

frontend/src/routes/+layout.svelte

@@ -91,7 +91,7 @@
     <div class="container">
       <h1 class="title">Flugbuech</h1>
       <p class="subtitle">
-        {$i18n.t('welcome', 'Welcome, {name}!', {name: $loginState?.username || 'Guest'})}
+        {$i18n.t('layout.welcome', 'Welcome, {name}!', {name: $loginState?.username || 'Guest'})}
       </p>
     </div>
   </header>

frontend/src/routes/+page.svelte

@@ -2,6 +2,7 @@
   import {onMount} from 'svelte';
 
   import Flashes from '$lib/components/Flashes.svelte';
+  import {i18n} from '$lib/i18n';
   import {ResolvablePromise} from '$lib/resolvable-promise';
 
   import {_loadApiStats, type GlobalStats} from './+page';
@@ -28,11 +29,13 @@
   </div>
 </article>
 
-<h2 class="title is-size-2">Overview</h2>
+<h2 class="title is-size-2">{$i18n.t('home.title--overview', 'Overview')}</h2>
 
 <p class="content">
-  Welcome to <em>Flugbuech</em>! This is a free, open source and ad-free platform for keeping track
-  of your free flights (paragliding or hang gliding).
+  {$i18n.t(
+    'home.intro',
+    'Welcome to Flugbuech! This is a free, open source and ad-free platform for keeping track of your free flights (paragliding or hang gliding).',
+  )}
 </p>
 
 <div class="content">

frontend/src/translations/de/translation.json

@@ -1,3 +1,9 @@
 {
-  "welcome": "Willkommen, {name}!"
+  "layout": {
+    "welcome": "Willkommen, {name}!"
+  },
+  "home": {
+    "intro": "Willkommen zu Flugbuech! Dies ist eine kostenlose, quelloffene und werbefreie Plattform zur Eintragung deiner Gleitschirm- und Drachenflüge.",
+    "title--overview": "Überblick"
+  }
 }

frontend/src/translations/en/translation.json

@@ -1,3 +1,9 @@
 {
-  "welcome": "Welcome, {name}!"
+  "layout": {
+    "welcome": "Welcome, {name}!"
+  },
+  "home": {
+    "intro": "Welcome to Flugbuech! This is a free, open source and ad-free platform for keeping track of your free flights (paragliding or hang gliding).",
+    "title--overview": "Overview"
+  }
 }