docs: Add Aster's notebook to showcase.md (#912)

Aster Hu

2024-02-22 916aedce40864a485724d9df78879e8d130beab3

 quartz/components/ExplorerNode.tsx

@@ -12,7 +12,7 @@
type OrderEntries = "sort" | "filter" | "map"

export interface Options {
  title: string
  title?: string
  folderDefaultState: "collapsed" | "open"
  folderClickBehavior: "collapse" | "link"
  useSavedState: boolean