Better error messaging for failed validation rule parsing

src/Exceptions/CouldntProcessValidationRule.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace Knuckles\Scribe\Exceptions;
+
+use Throwable;
+
+class CouldntProcessValidationRule extends \RuntimeException implements ScribeException
+{
+    public static function forParam(string $paramName, $rule,  Throwable $innerException): CouldntProcessValidationRule
+    {
+        return new self(
+            "Couldn't process this validation rule for the param `$paramName`: ".var_export($rule, true),
+            0, $innerException
+        );
+    }
+}

src/Exceptions/ProblemParsingValidationRules.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace Knuckles\Scribe\Exceptions;
+
+use Throwable;
+
+class ProblemParsingValidationRules extends \RuntimeException implements ScribeException
+{
+    public static function forParam(string $paramName,  Throwable $innerException): ProblemParsingValidationRules
+    {
+        return new self(
+            "Problem processing validation rules for the param `$paramName`",
+            0, $innerException);
+    }
+}