feat: Add Admin Groups Management Module

- Introduced a new module for managing user groups (`usrgrp`) in the administration interface.
- Implemented CRUD operations for user groups: list, create, rename, and delete.
- Added authorization checks to ensure only users with appropriate permissions can manage groups.
- Created corresponding frontend JavaScript and SCSS files for the new module.
- Updated documentation to reflect the new group management functionality and its authorization model.
- Added SQL stored procedures for group management operations.
- Established a new login script for database access, ensuring proper security practices.

Fuchs_Database/Security/fuchs_fds.login.sql

@@ -0,0 +1,6 @@
+-- Server-level login referenced by the [fuchs_fds] database user.
+-- Exists only so the project model resolves (SQL71501); the real password
+-- is managed on the server and never taken from this script.
+CREATE LOGIN [fuchs_fds]
+    WITH PASSWORD = N'placeholder-not-deployed';
+