feat: tambah sistem poin anggota (kehadiran +10, artikel +5)

- Model MemberPoint + migration
- PostObserver: +5 poin saat artikel dipublish
- ActivityObserver: +10 poin saat peserta hadir di kegiatan
- MemberPointResource: tampil di grup Organisasi
- MemberPointSeeder + update ActivitySeeder dengan pivot status kehadiran
- Update PermissionSeeder: anggota bisa lihat poin

database/seeders/MemberPointSeeder.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace Database\Seeders;
+
+use App\Models\Activity;
+use App\Models\MemberPoint;
+use App\Models\Post;
+use App\Models\User;
+use Illuminate\Database\Seeder;
+
+class MemberPointSeeder extends Seeder
+{
+    public function run(): void
+    {
+        // Poin kehadiran dari kegiatan yang sudah executed
+        Activity::whereNotNull('executed_at')->each(function ($activity) {
+            $activity->participants()->wherePivot('status', 'hadir')->each(function ($user) use ($activity) {
+                MemberPoint::firstOrCreate(
+                    ['user_id' => $user->id, 'source_type' => 'activity', 'source_id' => $activity->id],
+                    ['points' => 10, 'reason' => "Hadir di kegiatan: {$activity->title}"]
+                );
+            });
+        });
+
+        // Poin dari artikel yang sudah published
+        Post::where('status', 'published')->each(function ($post) {
+            MemberPoint::firstOrCreate(
+                ['user_id' => $post->user_id, 'source_type' => 'post', 'source_id' => $post->id],
+                ['points' => 5, 'reason' => "Artikel dipublikasi: {$post->title}"]
+            );
+        });
+    }
+}