feat: menu & API Informasi Sekolah untuk aplikasi wali

- Tabel school_informations (judul, isi, kategori, tanggal kegiatan, publish)
- Menu admin 'Informasi Sekolah' (CRUD + permission manage-school-info)
- API wali: GET /parent/school-informations (hanya yang dipublikasikan)
- 2 data contoh: Jadwal UTS & Class Meet
- Test suite tetap hijau (39 test)

app/Http/Controllers/Api/ParentSchoolInformationController.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace App\Http\Controllers\Api;
+
+use App\Http\Controllers\Controller;
+use App\Models\SchoolInformation;
+use Illuminate\Http\JsonResponse;
+
+class ParentSchoolInformationController extends Controller
+{
+    /**
+     * Daftar informasi sekolah yang dipublikasikan (untuk app wali murid).
+     */
+    public function index(): JsonResponse
+    {
+        $items = SchoolInformation::query()
+            ->where('is_published', true)
+            ->orderByDesc('event_date')
+            ->orderByDesc('created_at')
+            ->limit(50)
+            ->get()
+            ->map(fn (SchoolInformation $i) => [
+                'id' => $i->id,
+                'title' => $i->title,
+                'content' => $i->content,
+                'category' => $i->category,
+                'event_date' => $i->event_date?->toDateString(),
+                'created_at' => $i->created_at?->toISOString(),
+            ]);
+
+        return response()->json(['informations' => $items]);
+    }
+}