Finish the Macedonia stories and enrich image captions

Complete the three remaining Macedonia stories with sourced photos, so
both country sections are now fully illustrated.

Articles (EN/SI/MK each), placeholders replaced with real images:
- A Table Full of Macedonia (shared table, tavče gravče, ajvar,
  pastrmajlija).
- Music, Dance and the Moments That Bring Us Together (oro celebration,
  tapan and zurla, kopachkata, an MSOS event).
- History You Can Still Walk Through (Stobi, Heraclea Lyncestis, Kokino,
  Makedonium).
Each image is center-cropped to a uniform 3:2, downscaled, and given an
attribution caption with place, photographer where known, and source
link.

Captions:
- Replace bare one-word labels with a short descriptive phrase in all
  three languages, so a caption reads "Kokino, a prehistoric megalithic
  observatory" rather than just "Kokino". Applies across the food,
  culture, and heritage stories.
- Support an author-only credit with no external link, used for the
  photo from the MSOS archive.

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

en/get-to-know-macedonia/ohrid-more-than-a-postcard/index.html

@@ -222,7 +222,7 @@
 
                 <figure class="article-inline-image">
                     <img src="../../../images/macedonia-ohrid-chinar-tree.jpg" alt="The ancient plane tree, the Chinar, in central Ohrid">
-                    <figcaption>The Chinar, Ohrid. Photo: <a href="https://www.rexby.com/Travelsofmozzy/ttd/ancient-tree-of-beauty" target="_blank" rel="noopener">rexby.com</a></figcaption>
+                    <figcaption>The Chinar, the centuries-old plane tree in Ohrid. Photo: <a href="https://www.rexby.com/Travelsofmozzy/ttd/ancient-tree-of-beauty" target="_blank" rel="noopener">rexby.com</a></figcaption>
                 </figure>
 
                 <h2>Plaošnik holds several periods in one place</h2>