feat(elements): add table class param usage

src/lib/_imports/objects/o-fixed-header-table/o-fixed-header-table.hbs

@@ -1,3 +1,12 @@
-<div class="o-fixed-header-table">
-  {{> @table data=data caption="Header stays pinned top top of container on scroll." }}
-</div>
+<dl>
+  <dt>Class Directly on Table</dt>
+  <dd>
+    {{> @table data=data caption="Header stays pinned top top of container on scroll." class="o-fixed-header-table" }}
+  </dd>
+</dl>
+<dl>
+  <dt>Class on Table Wrapper</dt>
+  <dd class="o-fixed-header-table">
+    {{> @table data=data caption="Header stays pinned top top of container on scroll." }}
+  </dd>
+</dl>

src/lib/_imports/objects/o-fixed-header-table/readme.md

@@ -1,5 +1,7 @@
 A [table]({{path './table' }}) with its header pinned during vertical scroll.
 
+_Do not add the class to a wrapper unless your use case demands one. Do not create a wrapper unless your use case demands it. (One may already exist.)_
+
 > **?⃝ Explanation**
 >
 > [You can’t position: sticky; a `<thead>`. Nor a `<tr>`. But you can sticky a `<th>`…][source]