Add PHP 8.5 support to PHPArkitect parser

- Added PHP_8_5 constant to TargetPhpVersion
- Added 8.5 to VALID_PHP_VERSIONS array
- Updated latest() method to return PHP 8.5
- Removed continue-on-error from CI workflow

This fixes all 28 test failures on PHP 8.5 caused by the parser
rejecting PHP 8.5 as an invalid version.

Fixes #541

Author: claude

src/CLI/TargetPhpVersion.php

@@ -14,6 +14,7 @@ class TargetPhpVersion
     public const PHP_8_2 = '8.2';
     public const PHP_8_3 = '8.3';
     public const PHP_8_4 = '8.4';
+    public const PHP_8_5 = '8.5';
 
     public const VALID_PHP_VERSIONS = [
         '7.4',
@@ -22,6 +23,7 @@ class TargetPhpVersion
         '8.2',
         '8.3',
         '8.4',
+        '8.5',
     ];
 
     private string $version;
@@ -42,7 +44,7 @@ private function __construct(string $version)
 
     public static function latest(): self
     {
-        return new self(self::PHP_8_4);
+        return new self(self::PHP_8_5);
     }
 
     public static function create(?string $version): self