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/prisma/schema.prisma

@@ -854,7 +854,7 @@ model FeatureFlag {
 model BotPresenceConfig {
   id                 String   @id @default("singleton")
   status             String   @default("online")
-  activityType       String   @default("Playing")
+  activityType       String   @default("Watching")
   activityText       String   @default("nexumi.de")
   rotatingMessages   Json?
   maintenanceMode    Boolean  @default(false)