C# docker isolation provider

[Konard]

First step:

Make a web-server using C# .NET 6+ that can run a function in C#. The web server receives C# code as a string, compiles it, runs it, and returns the result in JSON format as an HTTP response.

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Forked from deep-foundation/deep-packages#10 by https://github.com/konard/gh-org-migrator