feat(matrix-skilltree-bot): add Matrix bot for skill tree and XP management

- Skill management: create, list, view details, delete
- XP tracking with level-up notifications
- Branch filtering (intellect, body, creativity, social, practical, mindset, custom)
- Activity history per skill or global
- User statistics (total XP, skill count, highest level, streak)
- German/English command aliases
- Number-based reference system for ease of use
- JWT auth via mana-core-auth
- Health check endpoint on port 3326

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

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

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