Invite to join the NCalc organization and mark the package as depreated

[gumbarros]

Hello @sklose , considering the deprecation of the CoreCLR-NCalc package, as it appears to no longer be actively maintained and is at second at the search results.

I am very grateful for the features you developed in this repository and that we have migrated to this NCalc repo. Because of this, I invite you to join the organization on GitHub, add the project there and mark it as obsolete on GitHub and NuGet, with this we can redirect all users to a single maintained package.

EDIT: I see you already joined the organization, can you then add the project here for future reference and mark as "Public archive" at GitHub and "Obsolete" at NuGet?