Add 'Vad är amatörradio' page in the original's layout, link it from the front page

Co-Authored-By: Claude Sonnet 5.5 <[email protected]>

src/pages.py

@@ -21,6 +21,7 @@ class Page:
 # Pages whose body comes from contents/static/<name>.html.
 PAGES = (
     Page("prov"),
+    Page("vad_ar_amatorradio"),
     Page("info"),
     Page("sok"),
     Page("kurser_karta", template="kurser-karta"),

templates/html/index.html

@@ -6,7 +6,7 @@
     </p>
     <div class="d-grid gap-3 d-md-block my-5">
       <a href="#lara" class="btn btn-primary btn-lg">{{ snippets.index_btn_start }}</a>
-      <a href="{{ pages.info }}" class="btn btn-outline-secondary btn-lg">{{ snippets.index_btn_vad_ar_amatorradio }}</a>
+      <a href="{{ pages.vad_ar_amatorradio }}" class="btn btn-outline-secondary btn-lg">{{ snippets.index_btn_vad_ar_amatorradio }}</a>
     </div>
     <p>
       <div class="alert alert-primary" role="alert">