Add Cart button and opening/closing transition

src/components/atoms/CartButton.svelte

@@ -0,0 +1,19 @@
+<script lang="ts">
+    import { cartOpen, cartAmount } from '$utils/store'
+    import ButtonCircle from './ButtonCircle.svelte'
+
+
+    const handleCartOpening = () => {
+        $cartOpen = true
+    }
+</script>
+
+<div class="shop-location__cart">
+    <ButtonCircle color="purple" on:click={handleCartOpening}>
+        <img src="/images/icons/pin.svg" alt="">
+    </ButtonCircle>
+
+    {#if $cartAmount > 0}
+        <span class="quantity">{$cartAmount}</span>
+    {/if}
+</div>