Re-add old blog posts from Astro

source/_includes/figure.html.twig

@@ -0,0 +1,8 @@
+<figure class="block">
+    <img src="{{ image.src }}" alt="{{ image.alt }}" class="p-1 border">
+    {% if caption %}
+        <figcaption class="mt-1 mb-0 italic text-sm text-center text-gray-800">
+            {{ caption }}
+        </figcaption>
+    {% endif %}
+</figure>

source/_includes/tweet.html.twig

@@ -0,0 +1,10 @@
+<div class="my-4 flex justify-center {{ class }}">
+  <blockquote
+      class="twitter-tweet"
+      lang="en"
+      {% if not data_cards %}data-cards="hidden"{% endif %}
+      {% if no_parent %}data-conversation="none"{% endif %}
+  >
+      {{ content|raw }}
+  </blockquote>
+</div>

source/_includes/youtube-video.html.twig

@@ -1,6 +1,8 @@
-<iframe
-  allowfullscreen
-  class="w-full border border-gray-500 aspect-[16/9]"
-  frameborder="0"
-  src="https://www.youtube.com/embed/{{ id }}?rel=0&iv_load_policy=3"
-></iframe>
+<div>
+  <iframe
+    allowfullscreen
+    class="w-full border border-gray-500 aspect-[16/9]"
+    frameborder="0"
+    src="https://www.youtube.com/embed/{{ id }}?rel=0&iv_load_policy=3"
+  ></iframe>
+</div>