Add `DOM.AsyncIterable` to the shared TypeScript configuration in
`@backstage/cli`, making standard async iteration methods available on
DOM APIs like `FileSystemDirectoryHandle`. This aligns behavior with
TypeScript 6.0, where this lib is included in `DOM` by default.
With the async iterable types now available, replace the custom
`IterableDirectoryHandle` and `WritableFileHandle` types in the scaffolder
plugin with the standard `FileSystemDirectoryHandle` and
`FileSystemFileHandle` DOM types. Add type guard functions for
`FileSystemHandle` since it is not a discriminated union.
Signed-off-by: Jon Koops <jonkoops@gmail.com>
Jon Koops
a7a14b78c1