content(projects): add 7 events/projects (2025-2026) with photo placeholders

Add trilingual (EN/MK/SI) event pages for seven MSOS activities:
- Joint Walk "Path Around the Wire" (May 2025)
- Kafanska vecher (May 2025)
- Watching the Macedonia-Wales match (Nov 2025)
- Team-building and MSOS Hub opening (Feb 2026)
- SEPA webinar with the National Bank of RNM (May 2026)
- President Siljanovska-Davkova lecture at UL (May 2026)
- Morning Coffee in front of CTK, 4th edition (Jun 2026)

Each page uses a neutral placeholder image (images/event-placeholder.svg)
in every hero/inline/gallery slot, with captions describing the intended
photo so real images can be dropped in later. Pages follow the existing
event template (narrative sections + scrollspy + photo gallery); no
"At a glance" classification box.

Wires the events into the Projects hub (filter cards), News hub, sitemap,
bot-discovery files and the offline search index. Unrelated pages were
kept out of this commit to avoid build-tool encoding churn.

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

images/event-placeholder.svg

@@ -0,0 +1,9 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1600 1067" width="1600" height="1067" role="img" aria-label="Photo coming soon">
+  <rect width="1600" height="1067" fill="#EAECF0"/>
+  <g fill="#98A2B3" text-anchor="middle" font-family="Inter, Arial, sans-serif">
+    <circle cx="800" cy="470" r="70" fill="none" stroke="#98A2B3" stroke-width="10"/>
+    <path d="M770 470a30 30 0 0 1 60 0" fill="none" stroke="#98A2B3" stroke-width="10"/>
+    <rect x="640" y="360" width="320" height="230" rx="16" fill="none" stroke="#98A2B3" stroke-width="10"/>
+    <text x="800" y="680" font-size="46" font-weight="600">Photo coming soon</text>
+  </g>
+</svg>