Add showTitle option to tableOfContent and id to style it (#2472)

* Enhance Table of Contents: Add customizable title display option and update TOC title element with an ID

* add changeset

* remove showTitle option and add toc-title ID for styling

.changeset/gold-toes-smell.md

@@ -0,0 +1,5 @@
+---
+'fumadocs-ui': patch
+---
+
+Add a `toc-title` ID to the table of contents heading for styling purposes

apps/docs/content/docs/ui/(ui)/layouts/page.mdx

@@ -108,6 +108,8 @@ import { DocsPage } from 'fumadocs-ui/page';
 </DocsPage>;
 ```
 
+You can also style the TOC title with the `toc-title` ID.
+
 ### Last Updated Time
 
 Display last updated time of the page.

packages/ui/src/layouts/docs/page.tsx

@@ -20,6 +20,7 @@ import type { AnchorProviderProps } from 'fumadocs-core/toc';
 export function PageTOCTitle(props: ComponentProps<'h2'>) {
   return (
     <h3
+      id="toc-title"
       {...props}
       className={cn(
         'inline-flex items-center gap-1.5 text-sm text-fd-muted-foreground',