Add support API validation rules

app/Support/SupportApiRegistry.php

@@ -22,6 +22,19 @@ class SupportApiRegistry
         return $resources[$resource] ?? null;
     }
 
+    public static function validationClass(string $resource, string $action): ?string
+    {
+        $config = self::get($resource);
+
+        if (! $config) {
+            return null;
+        }
+
+        $validation = $config['validation'][$action] ?? null;
+
+        return is_string($validation) ? $validation : null;
+    }
+
     /**
      * @return array<int, string>
      */