feat: add markdown-it-pivot-table rendering module (#6574)

* feat: markdown-it-pivot-table

* chore: upgrade dependency version

* style: remove semicolon in renderer.js

---------

Co-authored-by: Nicolas Giard <github@ngpixel.com>

server/modules/rendering/markdown-pivot-table/renderer.js

@@ -0,0 +1,7 @@
+const pivotTable = require('markdown-it-pivot-table')
+
+module.exports = {
+  init (md) {
+    md.use(pivotTable)
+  }
+}