feat: Plan 3 — Manajemen Pengguna (Admin User Management)

- Add AdminUserController: CRUD users, assign role, reset password,
  self-delete guard (403 on own account)
- Add admin route group under role:administrator middleware
  (GET/POST/PUT/DELETE /api/admin/users, PUT /api/admin/users/{id}/password)
- Add resources/views/admin/users.blade.php: DaisyUI table + 4 modals
  (create, edit, reset password, delete confirm), stats grid, toast
- Add Admin nav link (administrator-only) to map and data navbars
- 9 new tests covering page access, API CRUD, self-delete guard, password reset
- Mark Plan 3 complete in missing_features.md; update README page list
- Save plan3 to docs/ for reference

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

resources/views/data.blade.php

@@ -36,6 +36,13 @@
             <ul class="menu menu-horizontal px-1 gap-1">
                 <li><a href="{{ url('/map') }}" class="font-medium"><i class="fa-solid fa-map"></i> Peta</a></li>
                 <li><a href="{{ url('/data') }}" class="font-semibold bg-primary/10 text-primary rounded-lg"><i class="fa-solid fa-table-list"></i> Data Tabular</a></li>
+                @if(auth()->user()->hasRole('administrator'))
+                <li>
+                    <a href="{{ url('/admin/users') }}" class="font-medium">
+                        <i class="fa-solid fa-users-gear"></i> Admin
+                    </a>
+                </li>
+                @endif
             </ul>
             <!-- User dropdown -->
             <div class="dropdown dropdown-end ml-2">