Docs: document the shipped .user-select-text utility

Author: julien-deramond

site/src/content/docs/utilities/user-select.mdx

@@ -15,12 +15,14 @@ Change the way in which the content is selected when the user interacts with it
 
 <Example code={`<p class="user-select-all">This paragraph will be entirely selected when clicked by the user.</p>
 <p class="user-select-auto">This paragraph has default select behavior.</p>
+<p class="user-select-text">This paragraph will only allow the text to be selected when clicked by the user, even if the CSS \`user-select\` property is set to something else.</p>
 <p class="user-select-none">This paragraph will not be selectable when clicked by the user.</p>`} />
 
 ## Use cases
 
 - **`.user-select-all`** - Useful for code snippets, IDs, or other content users might want to copy entirely
 - **`.user-select-auto`** - Default browser behavior, allows normal text selection
+- **`.user-select-text`** - Forces text to remain selectable, useful for overriding a `user-select: none` set by an ancestor
 - **`.user-select-none`** - Prevents text selection, useful for UI elements, buttons, or decorative text
 
 <Callout>