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`.

.vscode/ftp-kr.json

@@ -12,6 +12,9 @@
   "ignoreRemoteModification": true,
   "ignore": [
     ".git",
-    "/.vscode"
+    "/.vscode",
+    "/.serena",
+    "/.claude",
+    "CLAUDE.md"
   ]
 }