Xiaokui Shu

For now, @vereimyst may want to go ahead and use `src_ref` as the suggestion but not `src_ref.value`. We can beef it up in a later version. A possible future upgrade...

### Two main options 1. optional dep (dash or underscore is currently an issue: https://github.com/pypa/pip/issues/11649) ``` pip install kestrel-lang[stix-shifter, docker, jupyter] ``` 2. separate packages ``` pip install kestrel-lang kestrel-datasource-interface-stixshifter...

going to merge `kestrel-jupyter` into `kestrel-lang` using https://gfscott.com/blog/merge-git-repos-and-keep-commit-history/

fixed in release [2023-10-18](https://github.com/opencybersecurityalliance/kestrel-lang/releases/tag/release-2023-10-18)