Detect errors directive

[ganyicz]

The scenario

Using @error directive inside a Blaze component template.

<input @error('name') invalid @enderror >

The problem

This throws an exception because we only inject the $errors variable when we detect its usage.

However, we only check for $errors, not @error.

The solution

Also check for @error in the source string:

str_contains($source, '$errors') || str_contains($source, '@error') ? '$errors = $__blaze->errors;'."\n" : null,

Added tests for both $errors and @error detection in WrapperTest.php.