feat: add basic book layout

src/_layouts/book.html

@@ -0,0 +1,37 @@
+---
+layout: base
+---
+
+<article class="[ catalogue ] [ flow ]">
+    <time class="[ date ] [ flex items-center gap-0.5 my-1 ]"
+          datetime="{{ date }}">
+        {% include "svgs/calendar.svg" %}
+    {{ date | formatDate("MMMM Do YYYY") }}</time>
+    <section class="[ meta ] [ flex justify-between mb-1 gap-1 ]">
+        <div>
+            <h1>{{ title }}</h1>
+            {% if subtitle %}<h2 class="[ text-fadeText my-1 ]">{{ subtitle }}</h2>{% endif %}
+            <hr />
+            <div class="[ catalogue-meta ] [ column-gap-1 row-gap-0.5 ]">
+                <div>
+                    <strong>Author</strong>
+                </div>
+                <div>{{ author }}</div>
+                <div>
+                    <strong>ISBN</strong>
+                </div>
+                <div>{{ isbn }}</div>
+            </div>
+            <hr />
+            <ul class="[ flex list-none p-0 gap-0.5 ]">
+                {% for tag in tags | filter(["catalogue", "book"]) %}
+                    <li class="[ bg-surface radius-1 px-1 py-0.5 ]">{{ tag }}</li>
+                {% endfor %}
+            </ul>
+        </div>
+        {% if image %}
+            <div>{% image image, "", "" %}</div>
+        {% endif %}
+    </section>
+    {{ content | safe }}
+</article>