Support vscode-server Jupyter extensions

[KayOhtie]

Take a look at https://github.com/quantapix/qnarre2/blob/06b41b6754f692f208efccf91bd62fd2feb265c4/proba/client/src-py/datascience/jupyter/kernels/kernelService.ts#L156 Requires extra metadata to confirm that the binary in fact exists instead of just parsing the argv. Otherwise you get "Kernel Spec for hass pyscript ignored as we cannot find a matching interpreter" as an error.