feat(matrix-manadeck-bot): add Matrix bot for card/deck management

- Full NestJS bot with matrix-bot-sdk integration
- Deck CRUD: list, create, view, delete decks
- Card management: view cards and card details
- AI generation: generate decks with AI (30 Mana)
- Study sessions: start learning sessions
- Progress tracking: due cards, statistics
- Public features: featured decks, leaderboard
- Credit system: mana balance display
- German/English command aliases
- Number-based reference system for decks and cards
- JWT auth via mana-core-auth
- Runs on port 3321

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

services/matrix-manadeck-bot/src/bot/bot.module.ts

@@ -0,0 +1,11 @@
+import { Module } from '@nestjs/common';
+import { MatrixService } from './matrix.service';
+import { ManadeckModule } from '../manadeck/manadeck.module';
+import { SessionModule } from '../session/session.module';
+
+@Module({
+	imports: [ManadeckModule, SessionModule],
+	providers: [MatrixService],
+	exports: [MatrixService],
+})
+export class BotModule {}