feat(components): add offcanvas component

packages/components/src/offcanvas/template.html

@@ -0,0 +1,51 @@
+<div id="mobile-nav" class="off-canvas">
+  <div class="off-canvas-content" transition:persist>
+    <button class="off-canvas-toggle" data-target="#mobile-nav">
+      <svg
+        width="40px"
+        height="40px"
+        viewBox="0 0 1024 1024"
+        xmlns="http://www.w3.org/2000/svg"
+        fill="#ffffff"
+      >
+        <g id="SVGRepo_bgCarrier" stroke-width="0"></g>
+        <g
+          id="SVGRepo_tracerCarrier"
+          stroke-linecap="round"
+          stroke-linejoin="round"
+        ></g>
+        <g id="SVGRepo_iconCarrier">
+          <path
+            fill="#cad3f5"
+            d="M195.2 195.2a64 64 0 0 1 90.496 0L512 421.504 738.304 195.2a64 64 0 0 1 90.496 90.496L602.496 512 828.8 738.304a64 64 0 0 1-90.496 90.496L512 602.496 285.696 828.8a64 64 0 0 1-90.496-90.496L421.504 512 195.2 285.696a64 64 0 0 1 0-90.496z"
+          ></path>
+        </g>
+      </svg>
+    </button>
+
+    <div class="content">
+      <slot />
+    </div>
+  </div>
+
+  <div
+    class="off-canvas-backdrop off-canvas-toggle"
+    data-target="#mobile-nav"
+  ></div>
+</div>
+
+<script>
+  document.addEventListener("astro:page-load", () => {
+    document.querySelectorAll <
+      HTMLElement >
+      ".off-canvas-toggle".forEach((btn) =>
+        btn.addEventListener("click", () => {
+          const { target } = btn.dataset;
+
+          if (!target) return;
+
+          document.querySelector(target)?.classList.toggle("active");
+        }),
+      );
+  });
+</script>