refactor(components, hooks): rewrite ToC and useHeadingsTree

* replace TableOfContents component with TocWidget to keep the name of
widget components coherent
* replace `wrapper` prop with `tree` prop (the component no longer uses
the hook, it is up to the consumer to provide the headings tree)
* let consumer handle the widget title
* add options to useHeadingsTree hook to retrieve only the wanted
headings (and do not assume that h1 is unwanted)
* expect an ref object instead of an element in useHeadingsTree hook
* rename most of the types involved

1 files changed, 1 insertions, 1 deletions

diff --git a/src/components/organisms/widgets/index.ts b/src/components/organisms/widgets/index.ts
index 972561e..aaaefb3 100644
--- a/src/components/organisms/widgets/index.ts
+++ b/src/components/organisms/widgets/index.ts
@@ -2,4 +2,4 @@ export * from './image-widget';
 export * from './links-widget';
 export * from './sharing-widget';
 export * from './social-media-widget';
-export * from './table-of-contents';
+export * from './toc-widget';