Add TCF v2.2 bridge mode for external CMP integration (v1.3.0)

New cmp_mode setting toggles between the built-in banner (default,
unchanged) and a bridge mode that defers banner UX to an external
IAB TCF v2.2 certified CMP — e.g. Google's free Privacy & messaging
(Funding Choices) or Tarteaucitron.js — and listens to __tcfapi to
keep custom-script gating, attribution preservation, the att_cc_consent
cookie cache and the WP Consent API bridge in sync. Lets sites that
need a Google-certified CMP for EEA/UK AdSense/AdMob serving keep
using this plugin for everything except the consent UI itself.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

att-consent.php

@@ -3,7 +3,7 @@
  * Plugin Name: ATT Consent
  * Plugin URI:  https://github.com/att-consent/att-consent
  * Description: Google Consent Mode v2 cookie consent with session attribution preservation, custom script management, and full gtag.js/GTM support.
- * Version:     1.2.0
+ * Version:     1.3.0
  * Requires at least: 6.0
  * Requires PHP: 7.4
  * Author:      ATT Consent
@@ -18,7 +18,7 @@ if ( ! defined( 'ABSPATH' ) ) {
 	exit;
 }
 
-define( 'ATT_CC_VERSION', '1.2.0' );
+define( 'ATT_CC_VERSION', '1.3.0' );
 define( 'ATT_CC_PLUGIN_DIR', plugin_dir_path( __FILE__ ) );
 define( 'ATT_CC_PLUGIN_URL', plugin_dir_url( __FILE__ ) );
 define( 'ATT_CC_PLUGIN_BASENAME', plugin_basename( __FILE__ ) );