feat(IFK-11): migrate from Congo to HugoBlox with custom layouts

- Remove Congo theme submodule, add Hugo modules (blox-core)
- Custom baseof/single/home/list layouts (no Tailwind build needed)
- Newsreader serif font preserved throughout
- Agiliton lime/emerald brand colors
- All 7 shortcodes preserved (world-map, charts, stats, etc.)
- Multilingual EN/DE/FR with i18n files
- Self-hosted fonts, no external CSS dependencies
- Wide content layout, clean research-publication aesthetic

Reference: metaconscious.org, matteocourthoud.github.io

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

layouts/_default/list.html

@@ -0,0 +1,35 @@
+{{ define "main" }}
+<div class="max-w-3xl mx-auto py-12 px-4">
+  <header class="mb-12">
+    <h1 class="text-4xl font-newsreader font-semibold mb-4">{{ .Title }}</h1>
+    {{ with .Description }}
+    <p class="text-lg text-gray-600">{{ . }}</p>
+    {{ end }}
+  </header>
+
+  <div class="space-y-8">
+    {{ range .Paginator.Pages }}
+    <article class="pb-8 border-b last:border-b-0">
+      <h2 class="text-2xl font-newsreader font-semibold mb-2">
+        <a href="{{ .Permalink }}" class="text-ifk-accent hover:text-ifk-accent-hover">
+          {{ .Title }}
+        </a>
+      </h2>
+      <div class="text-sm text-gray-600 mb-3">
+        <time datetime="{{ .Date.Format "2006-01-02" }}">{{ .Date.Format "January 2, 2006" }}</time>
+        {{ with .Params.author }}— {{ . }}{{ end }}
+        {{ if .ReadingTime }}— {{ .ReadingTime }} min read{{ end }}
+      </div>
+      <p class="text-lg font-newsreader leading-relaxed mb-3">
+        {{ .Summary }}
+      </p>
+      <a href="{{ .Permalink }}" class="inline-block text-ifk-accent hover:text-ifk-accent-hover font-medium">
+        {{ i18n "read_more" | default "Read more" }} →
+      </a>
+    </article>
+    {{ end }}
+  </div>
+
+  {{ template "_internal/pagination.html" . }}
+</div>
+{{ end }}