feat: add validation for charges targetting projects not in campaign

src/Validator/ChargeToProjectInCampaign.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace App\Validator;
+
+use Symfony\Component\Validator\Constraint;
+
+#[\Attribute(\Attribute::TARGET_PROPERTY | \Attribute::TARGET_METHOD | \Attribute::IS_REPEATABLE)]
+final class ChargeToProjectInCampaign extends Constraint
+{
+    public string $message = 'The targeted Project {{ project }} behind Accounting {{ target }} is not in a status where it can receive Charges.';
+}