Initial commit: ws_vatcheck at v1.0.3

Includes the fix for the GR/EL VAT prefix bug that broke exemption for
every Greek VAT number (in_array-on-values vs array_key_exists in
CacheTaxManager/VatNumber, plus the missing use import in
EuValidatorAdapter). Adds IMPROVEMENTS.txt with a checklist of features
adopted from comparing against the vatchecker module (offline-fallback
policy, failure logging, company-name check, configurable EU country
list, per-product exclusion, GB/XI mapping, AJAX live validation,
address-priority strategy).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

vendor/composer/installed.php

@@ -0,0 +1,32 @@
+<?php return array(
+    'root' => array(
+        'name' => 'websmid/vatcheck',
+        'pretty_version' => '1.0.0+no-version-set',
+        'version' => '1.0.0.0',
+        'reference' => null,
+        'type' => 'prestashop-module',
+        'install_path' => __DIR__ . '/../../',
+        'aliases' => array(),
+        'dev' => true,
+    ),
+    'versions' => array(
+        'ph-7/eu-vat-validator' => array(
+            'pretty_version' => '3.1',
+            'version' => '3.1.0.0',
+            'reference' => '03dc5305984ad71a71c363ab4cb1f691a5d9408b',
+            'type' => 'library',
+            'install_path' => __DIR__ . '/../ph-7/eu-vat-validator',
+            'aliases' => array(),
+            'dev_requirement' => false,
+        ),
+        'websmid/vatcheck' => array(
+            'pretty_version' => '1.0.0+no-version-set',
+            'version' => '1.0.0.0',
+            'reference' => null,
+            'type' => 'prestashop-module',
+            'install_path' => __DIR__ . '/../../',
+            'aliases' => array(),
+            'dev_requirement' => false,
+        ),
+    ),
+);