feat: add accessibility title and description to pie chart

* Reuse the title as the title element
* Add description to the parser and then render

src/accessibility.js

@@ -0,0 +1,25 @@
+/**
+ * This method will add a basic title and description element to a chart. The yy parser will need to
+ * respond to getTitle and getAccDescription, where the title is the title element on the chart,
+ * which is not displayed and the accDescription is the description element on the chart, which is
+ * also not displayed.
+ *
+ * @param yy_parser
+ * @param svg
+ * @param id
+ */
+export default function addSVGAccessibilityFields(yy_parser, svg, id) {
+  let title_string = yy_parser.getTitle();
+  let description = yy_parser.getAccDescription();
+  svg.attr('role', 'img').attr('aria-labelledby', 'chart-title-' + id + ' chart-desc-' + id);
+
+  svg
+    .insert('desc', ':first-child')
+    .attr('id', 'chart-desc-' + id)
+    .text(description);
+
+  svg
+    .insert('title', ':first-child')
+    .attr('id', 'chart-desc-' + id)
+    .text(title_string);
+}