v0.1.43: Add target `mx-semantics.plugin` (#243)
* Move the `plugin` submodule into the Python package * Copy `krypto.md` into `mx-semantics.source` * Add target `PluginTarget` * Set Version: 0.1.42 * Set Version: 0.1.43 --------- Co-authored-by: devops <[email protected]> Co-authored-by: rv-jenkins <[email protected]>