Update bot configuration and activity type in schema

- Modified package.json to add a new script for setting the bot banner.
- Changed the default activity type in schema.prisma from 'Playing' to 'Watching' for improved bot presence management.

apps/bot/scripts/set-bot-banner.ts

@@ -0,0 +1,60 @@
+/**
+ * Uploads docs/logo/nexumi-banner.png as the bot user banner (and optional bio)
+ * via Discord API.
+ *
+ * Usage (from repo root):
+ *   pnpm --filter @nexumi/bot profile:banner
+ *
+ * Requires BOT_TOKEN in the environment (or root/.env / apps/bot/.env).
+ */
+import { readFileSync, existsSync } from 'node:fs';
+import { resolve, dirname } from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { config as loadEnv } from 'dotenv';
+
+const here = dirname(fileURLToPath(import.meta.url));
+const repoRoot = resolve(here, '../../..');
+
+for (const candidate of [resolve(repoRoot, '.env'), resolve(here, '../.env')]) {
+  if (existsSync(candidate)) {
+    loadEnv({ path: candidate });
+  }
+}
+
+const token = process.env.BOT_TOKEN;
+if (!token) {
+  console.error('BOT_TOKEN is missing.');
+  process.exit(1);
+}
+
+const bannerPath = resolve(repoRoot, 'docs/logo/nexumi-banner.png');
+if (!existsSync(bannerPath)) {
+  console.error(`Banner not found: ${bannerPath}`);
+  process.exit(1);
+}
+
+const png = readFileSync(bannerPath);
+const bannerDataUri = `data:image/png;base64,${png.toString('base64')}`;
+
+const bio =
+  'Moderation, Community & Integrationen — in einem Bot.\n' +
+  'Dashboard: https://dashboard.nexumi.de\n' +
+  'nexumi.de';
+
+const response = await fetch('https://discord.com/api/v10/users/@me', {
+  method: 'PATCH',
+  headers: {
+    Authorization: `Bot ${token}`,
+    'Content-Type': 'application/json'
+  },
+  body: JSON.stringify({ banner: bannerDataUri, bio })
+});
+
+const body = await response.text();
+if (!response.ok) {
+  console.error(`Failed (${response.status}): ${body}`);
+  process.exit(1);
+}
+
+console.log('Bot profile updated successfully.');
+console.log(body);