CLI `bundle` command: add `debug_mode` and `kernel` flags

[plafer]

Context: https://github.com/0xPolygonMiden/miden-vm/pull/1445#discussion_r1713748940 and https://github.com/0xPolygonMiden/miden-vm/pull/1445#discussion_r1713778654

Currently, the bundle CLI command

1. creates a Library from a directory, and
2. automatically includes debug symbols.

It would be great if both were configurable: a --kernel flag would create a KernelLibrary instead of a Library, and a --debug flag would specify to include debug symbols (otherwise they wouldn't be).