Includes visual snippet in validation error message

Enhances validation error messages by including the visual snippet from the lexer/parser, which provides more context to the user about the location of the error in the regular expression.

This improves the debugging experience for users as they can quickly identify and fix issues in their regular expressions.

Author: yoeunes

src/Regex.php

@@ -197,7 +197,14 @@ public function validate(string $regex): ValidationResult
 
             return new ValidationResult(true, null, $score);
         } catch (LexerException|ParserException $e) {
-            return new ValidationResult(false, $e->getMessage());
+            $message = $e->getMessage();
+            $snippet = $e->getVisualSnippet();
+
+            if ('' !== $snippet) {
+                $message .= "\n".$snippet;
+            }
+
+            return new ValidationResult(false, $message);
         }
     }