Revert "chore: remove Truncate since it does not exist in Carbon v11"

This reverts commit 5833536199.

COMPONENT_INDEX.md

@@ -167,6 +167,7 @@
 - [`TooltipFooter`](#tooltipfooter)
 - [`TooltipIcon`](#tooltipicon)
 - [`TreeView`](#treeview)
+- [`Truncate`](#truncate)
 - [`UnorderedList`](#unorderedlist)
 
 ---
@@ -4708,6 +4709,24 @@ export interface TreeNode {
 | focus      | dispatched | <code>TreeNode & { expanded: boolean; leaf: boolean; }</code> |
 | keydown    | forwarded  | --                                                            |
 
+## `Truncate`
+
+### Props
+
+| Prop name | Required | Kind             | Reactive | Type                              | Default value      | Description |
+| :-------- | :------- | :--------------- | :------- | --------------------------------- | ------------------ | ----------- |
+| clamp     | No       | <code>let</code> | No       | <code>"end" &#124; "front"</code> | <code>"end"</code> | --          |
+
+### Slots
+
+| Slot name | Default | Props | Fallback |
+| :-------- | :------ | :---- | :------- |
+| --        | Yes     | --    | --       |
+
+### Events
+
+None.
+
 ## `UnorderedList`
 
 ### Props