Enhance guild management features in the owner panel

- Updated the guilds API to support searching by both guild name and ID, improving user experience.
- Increased the number of guilds retrieved from the database from 100 to 200 for better visibility.
- Implemented invite creation functionality, allowing owners to generate invites directly from the guild management interface.
- Enhanced the UI to display guild names, icons, and member counts, providing a more informative overview.
- Updated localization files to reflect new search capabilities and invite-related messages in both English and German.

apps/webui/src/lib/discord-guild-resources.ts

@@ -6,14 +6,26 @@ import { redis } from './redis';
 const DISCORD_API_BASE = 'https://discord.com/api/v10';
 const CACHE_TTL_SECONDS = 60;
 
-async function discordBotFetch<T>(path: string): Promise<T> {
+export async function discordBotFetch<T>(
+  path: string,
+  init?: { method?: string; body?: unknown }
+): Promise<T> {
+  const method = init?.method ?? 'GET';
   const response = await fetch(`${DISCORD_API_BASE}${path}`, {
-    headers: { Authorization: `Bot ${env.BOT_TOKEN}` },
+    method,
+    headers: {
+      Authorization: `Bot ${env.BOT_TOKEN}`,
+      ...(init?.body !== undefined ? { 'Content-Type': 'application/json' } : {})
+    },
+    body: init?.body !== undefined ? JSON.stringify(init.body) : undefined,
     cache: 'no-store'
   });
   if (!response.ok) {
     throw new Error(`Discord API request to ${path} failed with status ${response.status}`);
   }
+  if (response.status === 204) {
+    return undefined as T;
+  }
   return (await response.json()) as T;
 }