Please follow the steps to write a small project about kotlin.Task $6$: Test the GeneralManager singleton

In the function, create an instance of the GeneralManager singleton$.$

Create some new general objects with the name $($e$.$g$.,$ LIU Bei $)$ and add them to the list of generals.

Retrieve the general count and print it out.

Task $7$: Submit your work

Below is the expected output for this lab:

General LIU Bei created.

General CAO Cao created.

General SUN Quan created.

Total number of generals: $3$