Add privilege management system with related migrations and guards

- Introduced a new `PrivilegesModule` to manage user privileges and access control.
- Added `RequirePrivilege` decorator to enforce privilege checks on controller handlers.
- Implemented `PrivilegesGuard` to handle authorization based on user privileges.
- Created database migrations for `privileges`, `privilege_keys`, and `privilege_details` tables.
- Updated user model to include `is_superadmin` field for enhanced access control.
- Added unit tests for the new privileges functionality and guards to ensure correct behavior.

src/modules/privileges/privilege-key-code.ts

@@ -0,0 +1,14 @@
+/** Dotted uppercase module levels: MODULE / MODULE.RESOURCE / MODULE.RESOURCE.SUB */
+export const PRIVILEGE_KEY_CODE_PATTERN =
+  /^[A-Z][A-Z0-9_]*(\.[A-Z][A-Z0-9_]*)*$/;
+
+export function isValidPrivilegeKeyCode(code: string): boolean {
+  return typeof code === 'string' && PRIVILEGE_KEY_CODE_PATTERN.test(code);
+}
+
+export function assertPrivilegeKeyCode(code: string): string {
+  if (!isValidPrivilegeKeyCode(code)) {
+    throw new TypeError('Invalid privilege key code');
+  }
+  return code;
+}