feat(child-theme): scaffold asterion-bricks v0.1.0

Initial child theme structure inheriting from Bricks parent. Token-driven,
RGPD-native, mobile-first foundation ready for component and template work.

What's in this commit
- style.css: WP theme metadata (Template: bricks, v0.1.0)
- functions.php: enqueue cascade tokens -> utilities -> components,
  defer-loaded main.js, font preload, theme support, image sizes
  (av-hero 2400x1350, av-card 800x600, av-thumb 400x300), Gutenberg
  default styles dequeued
- theme.json: Gutenberg color/typo palette mirroring tokens
- assets/css/tokens.css: full design system per Design Handoff section 2
  (brand colors, neutrals, semantics, type scale + line-heights, 8pt
  spacing, radii, shadows, z-index, motion, prefers-reduced-motion)
- assets/css/utilities.css: modern reset + .av-container, .av-skip-link,
  .av-sr-only, .av-stack, .av-section helpers, opinionated heading scale
- assets/css/components.css: index of planned components + buttons
  (5 variants x 4 sizes per Design Handoff section 3.1) and links
- assets/js/main.js: vanilla skeleton with header scroll, IntersectionObserver
  reveal, count-up, mobile drawer; respects prefers-reduced-motion
- inc/cpt.php: register_post_type case_study (slug /customers/) + scenario
  (slug /scenarios/) + shared 'industry' taxonomy
- inc/seo.php: Organization JSON-LD on home; placeholders for Product,
  Article, FAQPage, BreadcrumbList
- assets/fonts/: Inter Variable + Italic WOFF2 self-hosted (RGPD; no
  Google Fonts CDN). Inter Display @font-face commented — Inter 4+ uses
  opsz axis from the same file.

Out of scope (intentionally deferred)
- Component fills: cards, forms, navigation, alerts, modals, tabs (placeholders)
- Page templates: home and beyond
- Bricks JSON template exports
- Schema.org Product / Article / FAQPage / BreadcrumbList implementations

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

wp-content/themes/asterion-bricks/inc/seo.php

@@ -0,0 +1,60 @@
+<?php
+/**
+ * Asterion Bricks — SEO module
+ *
+ * Hosts custom Schema.org JSON-LD and any meta-tag overrides specific to
+ * Asterion VR. Most generic SEO (title tags, OG, sitemap) is delegated to
+ * Rank Math or Yoast (per BRIEF section 4).
+ *
+ * Planned :
+ *   - Organization schema on home + footer-rendered pages
+ *   - Product schema on /solutions/* pages (each tier = a Product)
+ *   - Article schema on /insights/<slug>/
+ *   - FAQPage schema on /trust/ and conversion templates
+ *   - BreadcrumbList schema site-wide
+ *
+ * @package AsterionBricks
+ * @since   0.1.0
+ */
+
+defined('ABSPATH') || exit;
+
+/**
+ * Inject Organization JSON-LD on the home page.
+ * Safe minimum — extended once logos/SameAs URLs are confirmed.
+ */
+add_action('wp_head', function () {
+    if (! is_front_page()) {
+        return;
+    }
+
+    $org = [
+        '@context'  => 'https://schema.org',
+        '@type'     => 'Organization',
+        'name'      => 'Asterion VR',
+        'url'       => home_url('/'),
+        'logo'      => get_stylesheet_directory_uri() . '/assets/img/logo-asterion-vr.svg',
+        'foundingDate' => '2016',
+        'address'   => [
+            '@type'           => 'PostalAddress',
+            'addressLocality' => 'Montgermont',
+            'addressRegion'   => 'Bretagne',
+            'addressCountry'  => 'FR',
+        ],
+        'sameAs'    => [
+            // TODO : confirm public profiles with client.
+            // 'https://www.linkedin.com/company/asterion-vr/',
+            // 'https://www.youtube.com/@asterionvr',
+        ],
+    ];
+
+    printf(
+        "<script type=\"application/ld+json\">%s</script>\n",
+        wp_json_encode($org, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE)
+    );
+}, 5);
+
+// TODO : Product schema for /solutions/<tier>/ pages.
+// TODO : Article schema for /insights/<slug>/ pages.
+// TODO : FAQPage schema for /trust/ and conversion pages.
+// TODO : BreadcrumbList schema site-wide.