Enhance tag management with cooldown feature and related updates

- Added a `cooldownSeconds` field to the `Tag` model, allowing for customizable cooldown periods between tag responses.
- Updated tag command handling to incorporate cooldown logic, preventing spam and improving user experience.
- Enhanced the WebUI to support cooldown configuration for tags, including input validation and localization for cooldown messages.
- Refactored tag-related service functions to manage cooldowns effectively, ensuring accurate tracking and enforcement.
- Improved localization for new cooldown-related messages in both English and German.

apps/bot/prisma/migrations/20260725170000_tag_cooldown/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "Tag" ADD COLUMN "cooldownSeconds" INTEGER NOT NULL DEFAULT 15;