Add viator-collector plugin (Hop On Hop Off front-end reskin)

Consolidate the plugin into the TourWebsite repository (its separate
nested git repo has been removed). Includes the full new-design reskin:
scoped design stylesheet, SVG icon sprite, rebuilt listing/single/section
templates, and homepage hero/FAQ/testimonials shortcodes.

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

viator-collector/templates/taxonomy-viator.php

@@ -0,0 +1,32 @@
+<?php
+/**
+ * Shared archive for Viator destination / tag / category terms.
+ * Reuses the same listing UI (filters, sort, pagination) as the main archive.
+ */
+defined( 'ABSPATH' ) || exit;
+get_header();
+
+$vc_term = get_queried_object();
+$vc_name = ( $vc_term && ! is_wp_error( $vc_term ) ) ? $vc_term->name : __( 'Tours', 'viator-collector' );
+$vc_desc = term_description();
+?>
+<main class="vc-app vc-listing vc-listing--term">
+	<?php
+	echo vc_get_template( // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
+		'listing.php',
+		array(
+			'vc_title'    => $vc_name,
+			/* translators: %s: term name. */
+			'vc_subtitle' => $vc_desc ? wp_strip_all_tags( $vc_desc ) : sprintf( __( 'Explore the best tours in %s.', 'viator-collector' ), $vc_name ),
+			'vc_crumb'    => array(
+				array(
+					'label' => __( 'Tours', 'viator-collector' ),
+					'url'   => get_post_type_archive_link( 'viator_tour' ),
+				),
+			),
+		)
+	);
+	?>
+</main>
+<?php
+get_footer();