Add the ksy repositories as submodules of the formats repo.
Add the ksy repositories as submodules of the formats repo.

- [edid.ksy](https://github.com/kaitai-io/edid.ksy)
- [windows_resource_file.ksy](https://github.com/kaitai-io/windows_resource_file.ksy)
- [dicom.ksy](https://github.com/kaitai-io/dicom.ksy)
- [java_bytecode.ksy](https://github.com/kaitai-io/java_bytecode.ksy)

As suggested in #622 