feat: Implement module permissions system with database-driven access control

- Added `users_permissions` table for managing user permissions.
- Created `PermissionRepository` for handling permission logic.
- Refactored `controls\Users::permissions()` to utilize the new database structure.
- Introduced AJAX endpoint for saving user permissions.
- Enhanced user management UI with permission checkboxes.
- Added vacation management template for handling employee absences.
- Implemented tests for `PermissionRepository`.

templates/tasks/task_popup.php

@@ -14,10 +14,10 @@
       <span class="task-title-text"><?= $this -> task['name'];?></span>
       <a href="#" class="task-title-edit-btn" title="Edytuj tytuł"><i class="fa fa-pencil-square-o"></i></a>
 
-      <span class="task-title-edit-box" style="display:none;">
-          <input type="text" class="task-title-input form-control form-control-sm" value="<?= htmlspecialchars($this -> task['name']);?>">
-          <a href="#" class="task-title-save btn btn-success btn-sm"><i class="fa fa-check"></i></a>
-          <a href="#" class="task-title-cancel btn btn-danger btn-sm"><i class="fa fa-times"></i></a>
+      <span class="task-title-edit-box" style="display: none;">
+          <input type="text" class="task-title-input" value="<?= htmlspecialchars($this -> task['name']);?>">
+          <a href="#" class="task-title-save"><i class="fa fa-check"></i></a>
+          <a href="#" class="task-title-cancel"><i class="fa fa-times"></i></a>
       </span>
     </span>
   </div>