Added achievement data

app/Services/Achievements/Checkers/AirlinesAndAlliancesChecker.php

@@ -5,9 +5,14 @@ namespace App\Services\Achievements\Checkers;
 use App\Models\Alliance;
 use App\Models\User;
 use App\Models\UserFlight;
+use Illuminate\Support\Collection;
 
 class AirlinesAndAlliancesChecker extends BaseChecker
 {
+    const array US_3 = ['american-airlines', 'delta', 'united-airlines'];
+    const array ME_3 = ['emirates', 'etihad-airways', 'qatar-airways'];
+    const array CN_3 = ['china-southern-airlines', 'china-eastern', 'air-china'];
+
     public function check(): void
     {
         $flights = $this->flights();
@@ -25,5 +30,16 @@ class AirlinesAndAlliancesChecker extends BaseChecker
         $this->awardProgress($check('oneworld'),         'airlines_alliances.all_oneworld');
         $this->awardProgress($check('star_alliance'),    'airlines_alliances.all_star_alliance');
         $this->awardProgress($check('vanilla_alliance'), 'airlines_alliances.all_vanilla_alliance');
+
+        $flownAirlines = $flights
+            ->pluck('airline.internal_name')
+            ->filter()
+            ->unique();
+
+        $checkGroup = fn(array $group): int => $flownAirlines->intersect($group)->count();
+
+        $this->awardProgress($checkGroup(self::ME_3), 'airlines_alliances.me3');
+        $this->awardProgress($checkGroup(self::US_3), 'airlines_alliances.us3');
+        $this->awardProgress($checkGroup(self::CN_3), 'airlines_alliances.cn3');
     }
 }