Add "How to open a Slovenian bank account" blog post (EN/MK/SI)

- New scrollspy article page in all three languages, with guide-style
  warning callout, sourced link list + last-checked line, and standard
  author + newsletter blocks
- Blog listing featured card now links to the article and shows the hero
  photo + read-time instead of the "coming soon" placeholder
- Add hero image and cropped MSOS emblem avatar; add .blog-read-time and
  .blog-feat-thumb--image styles

MK/SI translations are AI-produced and need a native-speaker proofread.

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

si/blog/index.html

@@ -161,14 +161,14 @@
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                 </article>
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-                <article class="blog-feat " data-topic="guides">
-                    <div class="blog-feat-thumb"><i class="fas fa-signs-post" aria-hidden="true"></i></div>
+                <a class="blog-feat " data-topic="guides" href="how-to-open-slovenian-bank-account/">
+                    <div class="blog-feat-thumb blog-feat-thumb--image"><img src="../../images/blog-slovenian-bank-account.jpg" alt="Mednarodni študent uporablja mobilno bančništvo po odprtju slovenskega bančnega računa"></div>
                     <div class="blog-feat-body">
                         <span class="blog-tag blog-tag--guides"><i class="fas fa-signs-post" aria-hidden="true"></i> Vodniki</span>
                         <h3>Kako odpreti slovenski bančni račun</h3>
-                        <span class="blog-soon">Kmalu</span>
+                        <span class="blog-read-time"><i class="fas fa-clock" aria-hidden="true"></i> 8 min branja</span>
                     </div>
-                </article>
+                </a>
                 <article class="blog-feat " data-topic="study-tips">
                     <div class="blog-feat-thumb"><i class="fas fa-lightbulb" aria-hidden="true"></i></div>
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