Migrate WordPress site to Hugo

Replaces the WordPress 7.0.2 / HitMag site with a static Hugo build,
deployed by Gitea Actions over rsync/SSH.

Content: 26 files (9 pages + 17 posts) as Markdown page bundles, plus
127 of 165 media attachments. The remaining 38 are media-library
leftovers that appear nowhere on the live site; they are listed in
MIGRATION.md.

The WXR export contains neither media binaries nor widgets, so both were
recovered from the live host before it is retired:
  - tools/fetch_media.py downloads all uploads, capping them at 2000px
  - tools/build_data.py scrapes the "Unsere Mitglieder" and
    "In Erinnerung" widgets into data/*.yaml

TablePress' six Termine tables became data/termine.yaml, rendered with
the newest year expanded and earlier years collapsed. Old permalinks are
not preserved (clean slugs, no redirects, as agreed).

Custom layouts, no third-party theme. Plain CSS, since the pinned Hugo
0.164.0 is the non-extended build and cannot compile Sass.

Verified: clean build with zero warnings, 718 internal links checked and
none broken, no surviving wp-content URLs.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

layouts/list.html

@@ -0,0 +1,26 @@
+{{ define "main" }}
+  <div class="page">
+    <header class="page-header">
+      <h1>{{ .Title }}</h1>
+    </header>
+
+    {{ with .Content }}<div class="prose">{{ . }}</div>{{ end }}
+
+    {{ $pages := .RegularPages }}
+    {{ if $pages }}
+      {{ if eq .Section "aktuelles" }}
+        <div class="post-grid">
+          {{ range $pages }}
+            {{ partial "post-card.html" . }}
+          {{ end }}
+        </div>
+      {{ else }}
+        <ul class="page-list">
+          {{ range $pages.ByTitle }}
+            <li><a href="{{ .RelPermalink }}">{{ .Title }}</a></li>
+          {{ end }}
+        </ul>
+      {{ end }}
+    {{ end }}
+  </div>
+{{ end }}