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, 0 deletions

diff --git a/src/utils/hooks/use-headings-tree/index.ts b/src/utils/hooks/use-headings-tree/index.ts
new file mode 100644
index 0000000..8f4c115
--- /dev/null
+++ b/src/utils/hooks/use-headings-tree/index.ts
@@ -0,0 +1 @@
+export * from './use-headings-tree';