feat(chat): add chat room management functionality

- Created new chat schema in the database.
- Implemented chat room model with necessary fields (title, ownerId, roomTypeId, etc.).
- Added room type model and rights model for chat functionality.
- Developed API endpoints for managing chat rooms, including create, edit, and delete operations.
- Integrated chat room management into the admin interface with a dedicated view and dialog for room creation/editing.
- Added internationalization support for chat room management UI.
- Implemented autocomplete for victim selection in underground activities.
- Enhanced the underground view with new activity types and political target selection.

backend/models/chat/user_rights.js

@@ -0,0 +1,26 @@
+import { DataTypes } from 'sequelize';
+import { sequelize } from '../../utils/sequelize.js';
+import ChatUser from './user.js';
+import ChatRight from './rights.js';
+
+const ChatUserRight = sequelize.define('ChatUserRight', {
+    chatUserId: {
+        type: DataTypes.INTEGER,
+        allowNull: false,
+        primaryKey: true,
+        references: null, // Assoziation wird separat gesetzt
+    },
+    chatRightId: {
+        type: DataTypes.INTEGER,
+        allowNull: false,
+        primaryKey: true,
+        references: null, // Assoziation wird separat gesetzt
+    },
+}, {
+    schema: 'chat',
+    tableName: 'user_rights',
+    timestamps: false,
+    underscored: true,
+});
+
+export default ChatUserRight;