Init Scripts in new repo

Functional/IEither.cs

@@ -0,0 +1,14 @@
+namespace SJK.Functional;
+
+public interface IEither<TLeft, TRight>
+{
+  IEither<TNewLeft, TRight> MapLeft<TNewLeft>(Func<TLeft, TNewLeft> mapping);
+  IEither<TLeft, TNewRight> MapRight<TNewRight>(Func<TRight, TNewRight> mapping);
+  TLeft Reduce(Func<TRight, TLeft> mapping);
+  (TLeft?, TRight?) Deconstruct();
+  TResult Match<TResult>(Func<TLeft, TResult> left, Func<TRight, TResult> right);
+  void Match(Action<TLeft> left, Action<TRight> right);
+  IEither<TLeft, T2> Bind<T2>(Func<TRight, IEither<TLeft, T2>> value);
+  bool IsRight();
+  bool IsLeft() => !IsRight();
+}