Implementation of string parsing of operations on Utc Now.

To use the library, include the TechTest namespace.

To parse and execute an operation, use DateTimeOperation.Execute.

If the operation is invalid then an InvalidOperationException will be thrown.

For this implementation, it was stated not to use external libraries (e.g. Luxon). .NET has inbuilt DateTime functionality but I have purposefully not used this as I was unsure if this counted as an external library and was against the spirit of this exercise. If I were writing this code for real, I would have used this as my method of handling dates and times.

Any issues, please let me know by emailing [email protected].