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

app/Providers/AppServiceProvider.php

@@ -4,10 +4,12 @@ namespace App\Providers;
 
 use App\Models\Activity;
 use App\Models\CashRecord;
+use App\Models\Post;
 use App\Models\User;
 use App\Models\Vote;
 use App\Observers\ActivityObserver;
 use App\Observers\CashRecordObserver;
+use App\Observers\PostObserver;
 use App\Observers\UserObserver;
 use App\Observers\VoteObserver;
 use Illuminate\Support\ServiceProvider;
@@ -20,5 +22,6 @@ class AppServiceProvider extends ServiceProvider
         CashRecord::observe(CashRecordObserver::class);
         Activity::observe(ActivityObserver::class);
         Vote::observe(VoteObserver::class);
+        Post::observe(PostObserver::class);
     }
 }