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/Models/User.php

@@ -2,6 +2,7 @@
 
 namespace App\Models;
 
+use App\Models\MemberPoint;
 use Database\Factories\UserFactory;
 use Filament\Models\Contracts\FilamentUser;
 use Filament\Panel;
@@ -54,6 +55,16 @@ class User extends Authenticatable implements FilamentUser
         return $this->hasMany(CashRecord::class, 'created_by');
     }
 
+    public function points(): HasMany
+    {
+        return $this->hasMany(MemberPoint::class);
+    }
+
+    public function totalPoints(): int
+    {
+        return $this->points()->sum('points');
+    }
+
     public function canAccessPanel(Panel $panel): bool
     {
         return true;