feat(registry): add lower thirds catalog blocks (#1134)

Adds news ticker from #1134, the podcast/interview lower-thirds pack from #1689,
and the BILD-style lower third from #1276.

Also adds generated catalog pages for flowchart-vertical and vfx-liquid-glass
from #1525, plus a Lower Thirds catalog group for discovery.

Co-authored-by: Miguel Ángel <miguel.sierra@heygen.com>
Co-authored-by: Kiyeon Jeon <kiyeonjeon21@users.noreply.github.com>
Co-authored-by: sunlesshalo <198846711+sunlesshalo@users.noreply.github.com>
Co-authored-by: Moritz <moritz.wedel@axelspringer.com>
Co-authored-by: Claude Sonnet <noreply@anthropic.com>
Co-authored-by: Dashsoap <42135402+Dashsoap@users.noreply.github.com>

registry/registry.json

@@ -175,6 +175,54 @@
       "name": "yt-lower-third",
       "type": "hyperframes:block"
     },
+    {
+      "name": "news-ticker",
+      "type": "hyperframes:block"
+    },
+    {
+      "name": "lt-accent-underline",
+      "type": "hyperframes:block"
+    },
+    {
+      "name": "lt-bold-block",
+      "type": "hyperframes:block"
+    },
+    {
+      "name": "lt-clean-bar",
+      "type": "hyperframes:block"
+    },
+    {
+      "name": "lt-color-block",
+      "type": "hyperframes:block"
+    },
+    {
+      "name": "lt-dark-card",
+      "type": "hyperframes:block"
+    },
+    {
+      "name": "lt-kicker-name",
+      "type": "hyperframes:block"
+    },
+    {
+      "name": "lt-mask-reveal",
+      "type": "hyperframes:block"
+    },
+    {
+      "name": "lt-side-rule",
+      "type": "hyperframes:block"
+    },
+    {
+      "name": "lt-soft-pill",
+      "type": "hyperframes:block"
+    },
+    {
+      "name": "lt-stack-bars",
+      "type": "hyperframes:block"
+    },
+    {
+      "name": "lower-third-bild",
+      "type": "hyperframes:block"
+    },
     {
       "name": "x-post",
       "type": "hyperframes:block"