feat(validation): Remove regex validation for Relation (#39)

Author: OskarStark

src/Domain/Value/Resolver/Relation.php

@@ -26,6 +26,5 @@ public function __construct(
         public string $value,
     ) {
         TrimmedNonEmptyString::fromString($value);
-        Assert::regex($value, '/^([a-zA-Z].+)\.([a-zA-Z].+)$/');
     }
 }