perf/fix: externalize images to WP media; normalize Astra leaks; full-width

Plugin (1.8.2):
- remove all bundled raster images (~9.3MB) from assets/img; hero + single
  hero figure now come from the WP Media Library (Settings), shortcode args
  ([viator_hero image_id]), or the vc_testimonials filter — rendered responsive
- vc_hero_image_source() prefers an attachment ID (srcset); listing/hero use it
- settings: store hero_image_id + single_hero_figure_id (media pickers)
- enqueue at priority 20 + depend on astra-theme-css so our CSS wins ties
- stronger Astra overrides (!important): kill page-builder article top padding
  (gap above hero), force full-bleed containers, guard horizontal scroll
- normalize theme leaks inside .vc-app: no link underline, no list bullets
  (with prose exceptions for the tour Overview); gradient hero fallback

Theme: normalize .hoho link/list leaks; rebuild installable ZIP.
Also: move optimized originals to /removed-images/; ship viator-collector.zip.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01J4hNL1PSHxXbu94SCenpKj

viator-collector/templates/listing.php

@@ -75,10 +75,7 @@ $vc_page_url = function ( $n ) use ( $vc_action, $vc_base_args ) {
 	return empty( $args ) ? $vc_action : add_query_arg( $args, $vc_action );
 };
 
-$vc_hero_img = vc_hero_image_url();
-if ( ! $vc_hero_img ) {
-	$vc_hero_img = vc_asset_url( 'img/hero2.png' );
-}
+$vc_hero_img = vc_hero_image_source();
 ?>
 	<section class="hero hero--archive">
 		<div class="hero__media">