refactor(components): convert const to reactive where appropriate

- Inline class assignments to avoid script-level clutter
- Ignore a11y-missing-attribute instead of redundant href

src/components/Breadcrumb/BreadcrumbItem.svelte

@@ -8,22 +8,21 @@
   import { cx } from '../../lib';
   import Link from '../Link';
 
-  const ariaCurrent = $$props['aria-current'];
-  const _class = cx(
-    '--breadcrumb-item',
-    isCurrentPage && ariaCurrent !== 'page' && '--breadcrumb-item--current',
-    className
-  );
+  $: ariaCurrent = $$props['aria-current'];
 </script>
 
-{#if href}
-  <li on:click on:mouseover on:mouseenter on:mouseleave class={_class} {style}>
+<li
+  on:click
+  on:mouseover
+  on:mouseenter
+  on:mouseleave
+  class={cx('--breadcrumb-item', isCurrentPage && ariaCurrent !== 'page' && '--breadcrumb-item--current', className)}
+  {style}>
+  {#if href}
     <Link {href} aria-current={ariaCurrent}>
       <slot />
     </Link>
-  </li>
-{:else}
-  <li on:click on:mouseover on:mouseenter on:mouseleave class={_class} {style}>
+  {:else}
     <slot props={{ 'aria-current': ariaCurrent, class: cx('--link') }} />
-  </li>
-{/if}
+  {/if}
+</li>