feat: establish reservation portal foundation

app/Domain/Identity/Models/Permission.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Domain\Identity\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsToMany;
+
+class Permission extends Model
+{
+    protected $fillable = ['name', 'description'];
+
+    /** @return BelongsToMany<Role, $this> */
+    public function roles(): BelongsToMany
+    {
+        return $this->belongsToMany(Role::class);
+    }
+}