docs(helpers): add Text truncation page (#2670)

Co-authored-by: Julien Déramond <[email protected]>

site/content/docs/0.0/helpers/text-truncation.md

@@ -8,4 +8,18 @@ aliases:
 toc: false
 ---
 
-{{< callout-soon "helper" >}}
+For longer content, you can add a `.text-truncate` class to truncate the text with an ellipsis. **Requires `display: inline-block` or `display: block`.**
+
+{{< example >}}
+<!-- Block level -->
+<div class="row">
+  <div class="col-2 text-truncate">
+    This text is quite long, and will be truncated once displayed.
+  </div>
+</div>
+
+<!-- Inline level -->
+<span class="d-inline-block text-truncate" style="max-width: 150px;">
+  This text is quite long, and will be truncated once displayed.
+</span>
+{{< /example >}}

site/data/sidebar.yml

@@ -203,7 +203,6 @@
     - title: Stretched link
       draft: true
     - title: Text truncation
-      draft: true
     - title: Vertical rule
       draft: true
     - title: Visually hidden