Rewrite in C#

[rjkilpatrick]

Is your feature request related to a problem? Please describe.
GDscript is interpreted and incurs a large speed penalty for this. Rewriting the project in C# could lead to up to 4X speed improvement.
This is not an urgent problem, but as the project grows, it will get harder and harder to rewrite the project.

Describe the solution you'd like
Each GDscript file in the project to be re-written in the C# programming language instead.

Describe alternatives you've considered
C++ was considered, but this is largely too verbose and sacrifices ease of maintainability for speed.