convert Code component to new API

packages/bbui/src/Typography/Code.svelte

@@ -1,20 +1,10 @@
 <script>
-    import "@spectrum-css/typography/dist/index-vars.css"
+  import "@spectrum-css/typography/dist/index-vars.css"
 
-    // Sizes
-    export let xl = false;
-    export let l = false;
-    export let m = false;
-    export let s = false;
-    export let xs = false;
-    $: useDefault = ![xl, l, m, s, xs].includes(true)
+  // Sizes
+  export let size = "M"
 </script>
 
-<code class="spectrum-Code"
-    class:spectrum-Code--sizeXL={xl}
-    class:spectrum-Code--sizeL={l}
-    class:spectrum-Code--sizeM={m || useDefault}
-    class:spectrum-Code--sizeS={s}
-    class:spectrum-Code--sizeXS={xs}>
-    <slot />
-</code>
+<code class="spectrum-Code spectrum-Code--size{size}">
+  <slot />
+</code>