refactor: Merge formatters into matchers

src/PhpPact/Consumer/Matcher/Formatters/Expression/ExpressionFormatter.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace PhpPact\Consumer\Matcher\Formatters\Expression;
+
+use PhpPact\Consumer\Matcher\Exception\MatcherNotSupportedException;
+use PhpPact\Consumer\Matcher\Model\Expression;
+use PhpPact\Consumer\Matcher\Model\FormatterInterface;
+use PhpPact\Consumer\Matcher\Model\Matcher\ExpressionFormattableInterface;
+use PhpPact\Consumer\Matcher\Model\MatcherInterface;
+
+class ExpressionFormatter implements FormatterInterface
+{
+    public function format(MatcherInterface $matcher): Expression
+    {
+        if (!$matcher instanceof ExpressionFormattableInterface) {
+            throw new MatcherNotSupportedException('Matcher does not support expression format');
+        }
+
+        return $matcher->formatExpression();
+    }
+}