feat(components): add initial DataTable component

src/components/DataTable/TableRow.svelte

@@ -0,0 +1,20 @@
+<script>
+  let className = undefined;
+  export { className as class };
+  export let isSelected = false;
+  export let style = undefined;
+
+  import { cx } from '../../lib';
+
+  // TODO: include ariaLabel, onExpand, isExpanded, isSelected
+</script>
+
+<tr
+  on:click
+  on:mouseover
+  on:mouseenter
+  on:mouseleave
+  class={cx(isSelected && '--data-table--selected', className)}
+  {style}>
+  <slot />
+</tr>