Blog: add markdown->page converter + new post "Where to search for accommodation" (EN)

tools/build_blog.py converts a Markdown source into the site's scrollspy blog
article (title, header, hero, sidebar nav from ## headings, body). First output:
the new EN post "Where to search for student accommodation in Slovenia", added at
the top of the blog index (newest first), dated 2026-08-03, SEO injected.

MK/SI of this post and the rest of the blog batch (refresh 1-5, split trilingual
posts 2-4, personal essay post 7) still to come.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

en/blog/index.html

@@ -237,6 +237,15 @@
                     <button type="button" class="blog-chip" data-topic="guides"><i class="fas fa-signs-post" aria-hidden="true"></i> Guides</button>
                 </div>
                 <div class="blog-grid">
+                    <a class="blog-card" data-topic="student-life" href="where-to-search-for-accommodation-in-slovenia/">
+                        <div class="blog-thumb"><i class="fas fa-house" aria-hidden="true"></i></div>
+                        <div class="blog-card-body">
+                            <span class="blog-tag blog-tag--student-life"><i class="fas fa-mug-hot" aria-hidden="true"></i> Student life</span>
+                            <h3>Where to search for student accommodation in Slovenia</h3>
+                            <p>University housing, trusted rental sites, community groups, and what to check before you pay or sign — so you avoid scams and settle in safely.</p>
+                            <span class="blog-read-time"><i class="fas fa-clock" aria-hidden="true"></i> 7 min read</span>
+                        </div>
+                    </a>
                     <a class="blog-card" data-topic="guides" href="ad-futura-scholarship-slovenia-2026/">
                         <div class="blog-thumb"><i class="fas fa-hand-holding-dollar" aria-hidden="true"></i></div>
                         <div class="blog-card-body">