feat: Implement floors, locations, and racks management

- Added list, edit, and save functionalities for floors, locations, and racks.
- Enhanced UI with search and filter options for better usability.
- Implemented SVG upload for floor plans in the floors module.
- Added validation for required fields in the save processes.
- Improved navigation in the header to reflect new modules.
- Styled forms and tables for a consistent look and feel across modules.

app/index.php

@@ -27,7 +27,7 @@ $module = $_GET['module'] ?? 'dashboard';
 $action = $_GET['action'] ?? 'list';
 
 // Whitelist der Module
-$validModules = ['dashboard', 'device_types', 'devices', 'racks', 'floors', 'connections'];
+$validModules = ['dashboard', 'locations', 'buildings', 'device_types', 'devices', 'racks', 'floors', 'connections'];
 
 // Whitelist der Aktionen
 $validActions = ['list', 'edit', 'save', 'ports'];