Add photo copyright & usage clause (EN/MK/SI)

Add a "Photos, images & copyright" card to the Official information
(legal) page in all three languages, plus a short rights/removal note
on the Gallery and Events & Projects pages.

- Clarifies most images are MSOS property or used with permission, and
  that third-party images (Get to know Macedonia/Slovenia, Student
  Welcome Guide) remain their owners' property.
- Requires prior written permission to reuse MSOS's own images.
- Adds a photo-removal / consent-withdrawal path via info@msosorg.com.
- New shared .photo-rights-note style in css/pages/_gallery.css.

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

css/pages/_gallery.css

@@ -19,6 +19,18 @@
 }
 .gallery-lead { font-size: 18px; line-height: 28px; color: #475467; margin: 0; }
 
+/* Photo rights note (also reused on the Events & projects page) */
+.photo-rights-note {
+    max-width: 1180px;
+    margin: 0 auto;
+    padding: 0 24px 64px;
+    font-size: 14px;
+    line-height: 22px;
+    color: #667085;
+    text-align: center;
+}
+.photo-rights-note a { color: #2D738C; }
+
 /* ---------- Album grid ---------- */
 .gallery-albums {
     max-width: 1180px; margin: 0 auto; padding: 28px 24px 88px;