docs: convert useActiveDescendantListFocus stories file to TS

[karthik-script]

@rivka-ungar can you please add Labels on this for hacktoberfest-accepted? Thanks.

Description Convert the useActiveDescendantListFocus stories file to TypeScript:

Change the file extension to stories.tsx Resolve type issues (if there are), avoid using any and prefer existing types

Related files packages/core/src/hooks/useActiveDescendantListFocus/stories/useActiveDescendantListFocus.stories.js

• [X] I have read the Contribution Guide for this project.

Resolves # https://github.com/mondaycom/vibe/issues/2519