feat: cria novas regras de validaçao

 - Email
 - RegExp

upload/system/library/PagSeguro/src/Validation/Rules/Email.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace ValdeirPsr\PagSeguro\Validation\Rules;
+
+/**
+ * Valida um e-mail
+ */
+class Email implements IValidation
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function validate($input): bool
+    {
+        return filter_var($input, FILTER_VALIDATE_EMAIL);
+    }
+}

upload/system/library/PagSeguro/src/Validation/Rules/Regex.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace ValdeirPsr\PagSeguro\Validation\Rules;
+
+/**
+ * Valida um valor através de uma expressão regular
+ */
+class Regex implements IValidation
+{
+    private $regex;
+
+    public function __construct(string $regex)
+    {
+        $this->regex = $regex;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function validate($input): bool
+    {
+        return preg_match($this->regex, $input);
+    }
+}