feat: integrate Kirby CMS data with Vue print editor

- Add JSON content representation template (recit.json.php)
- Create virtual /print page plugin for recit pages
- Add recit.php base template for content representation
- Create Pinia store for recit data management
- Add block components (text, heading, image, list, quote, video, map)
- Update PagedJsWrapper for dynamic content rendering with data-page-type
- Modify header.php to pass recit JSON URL via data attribute
- Update App.vue to load recit data on mount

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

public/site/templates/recit.php

@@ -0,0 +1,33 @@
+<?php
+/**
+ * Template pour afficher un récit
+ * Ce template est requis pour que recit.json.php fonctionne
+ */
+?>
+<?php snippet('header') ?>
+
+<article class="recit">
+  <h1><?= $page->title() ?></h1>
+
+  <?php if ($page->author()->isNotEmpty()): ?>
+    <p class="author"><?= $page->author() ?></p>
+  <?php endif ?>
+
+  <?php if ($page->cover()->isNotEmpty()): ?>
+    <figure class="cover">
+      <?php if ($cover = $page->cover()->toFile()): ?>
+        <img src="<?= $cover->url() ?>" alt="">
+      <?php endif ?>
+    </figure>
+  <?php endif ?>
+
+  <?php if ($page->introduction()->isNotEmpty()): ?>
+    <div class="introduction">
+      <?= $page->introduction() ?>
+    </div>
+  <?php endif ?>
+
+  <p><a href="<?= $page->url() ?>/print">Ouvrir l'éditeur d'impression</a></p>
+</article>
+
+<?php snippet('footer') ?>