Add entering transition on Shop and fix some styling

- Center intro title vertically
- Cart item styling tweaks
- Add cart button quantity label inside of button so it's clickable

src/style/molecules/_cart-item.scss

@@ -39,6 +39,7 @@
     &__right {
         display: flex;
         flex-direction: column;
+        flex: 1;
 
         // Poster Title
         h3 {
@@ -52,7 +53,7 @@
         }
         // Text
         p {
-            max-width: 124px;
+            max-width: 152px;
             margin: 8px 0 20px;
             font-size: rem(12px);
             line-height: 1.4;
@@ -68,7 +69,7 @@
             align-items: center;
             height: 28px;
             margin-right: auto;
-            padding: 0 12px;
+            padding: 2px 12px 0;
             border: 1px solid rgba($color-lightgray, 0.3);
             border-radius: 100vh;
             cursor: pointer;