feat(matrix-contacts-bot): add Matrix bot for contact management

- List, search, and view contact details
- Create, edit, and delete contacts
- Toggle favorites and archive status
- Number-based reference system for easy commands
- German and English command aliases
- Login/logout via mana-core-auth

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

pnpm-lock.yaml

@@ -5800,6 +5800,40 @@ importers:
         specifier: ^5.7.3
         version: 5.9.3
 
+  services/matrix-contacts-bot:
+    dependencies:
+      '@nestjs/common':
+        specifier: ^10.4.15
+        version: 10.4.20(class-transformer@0.5.1)(class-validator@0.14.3)(reflect-metadata@0.2.2)(rxjs@7.8.2)
+      '@nestjs/config':
+        specifier: ^3.3.0
+        version: 3.3.0(@nestjs/common@10.4.20(class-transformer@0.5.1)(class-validator@0.14.3)(reflect-metadata@0.2.2)(rxjs@7.8.2))(rxjs@7.8.2)
+      '@nestjs/core':
+        specifier: ^10.4.15
+        version: 10.4.20(@nestjs/common@10.4.20(class-transformer@0.5.1)(class-validator@0.14.3)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/platform-express@10.4.20)(@nestjs/websockets@10.4.20)(encoding@0.1.13)(reflect-metadata@0.2.2)(rxjs@7.8.2)
+      '@nestjs/platform-express':
+        specifier: ^10.4.15
+        version: 10.4.20(@nestjs/common@10.4.20(class-transformer@0.5.1)(class-validator@0.14.3)(reflect-metadata@0.2.2)(rxjs@7.8.2))(@nestjs/core@10.4.20)
+      matrix-bot-sdk:
+        specifier: ^0.7.1
+        version: 0.7.1
+      reflect-metadata:
+        specifier: ^0.2.2
+        version: 0.2.2
+      rxjs:
+        specifier: ^7.8.1
+        version: 7.8.2
+    devDependencies:
+      '@nestjs/cli':
+        specifier: ^10.4.9
+        version: 10.4.9
+      '@types/node':
+        specifier: ^22.10.2
+        version: 22.19.1
+      typescript:
+        specifier: ^5.7.2
+        version: 5.9.3
+
   services/matrix-mana-bot:
     dependencies:
       '@manacore/bot-services':