globbing/wildcards in "resources" field

It looks like if I have tens of YAML files in a directory, my kustomization.yaml will exhaustively list them like this:

```yaml
resources:
- secret.yaml
- service.yaml
- deployment.yaml
```

It feels like a bit inconvenience. Is it possible to use globs (i.e. `**.yaml`) for this field? (Skaffold does support this and it's helpful.)

I think if I use kustomize and add new YAML files, aside from `kubectl apply -R -f .dir` working out of the box, I now have to go back and edit kustomization.yaml for it to work (in other words: two places to update).

The issue identifies the resources field in kustomization.yaml but names no source file, test, or entry point. Start by locating the resources-field implementation and its existing tests, then define done as tested support for the requested recursive YAML glob behavior without breaking explicit resource lists.

Written by the indexing model from the issue text.