First: make a unity project for this package to live in.
Second: clone this repository into the packages folder.
Third: Add an editor folder in the project's assets folder.
Fourth: add this script under any name to that folder.

using System.Diagnostics;
using UnityEditor;

public class OpenPackageDir
{
    [MenuItem("Processes/Open Utils")]
    public static void OpenPowershellWindow()
    {
        Process.Start("powershell.exe", "-noexit -command \"cd packages/soulshardutilities\"");
    }
}

You should now have a menu item on your top bar of the unity
editor that you can quickly open a PowerShell window from to
push your changes to this repository.

Fifth: open the Test Runner window.

This will make sure that any changes you make will not break
existing code, just click Run All before committing your changes