How to get Command Line Tool code to launch SwiftUI App code

For MacOS I wrote a Terminal Command Line Tool to help me do number crunching calculations. No need for UI. This works great as-is, but there are opportunities to make the work more interesting by giving it some graphical representation like a heat map of the data. To that end I want the terminal to launch a SwiftUI code to open a window given an optional command line parameter that would display this visual representation of data in a new window. It would be nice to interact with that window visualization in some ways using SwiftUI.

I originally thought it'd just be as easy as creating a SwiftUI View file and then throwing what normally appears under @main into a launch function and then calling the launch function from my main.swift file:

import SwiftUI

struct SwiftUIView: View {
    var body: some View {
        Text("Hello, World!")
    }
}

#Preview {
    SwiftUIView()
}

func LaunchSwiftUIApp()
{
    //@main 
    struct SwiftUIApp: App {
        var body: some Scene {
            WindowGroup {
                SwiftUIView()
            }
        }
    }
}

Of course this doesn't work.

I've already have the command line code just spit out various png files via command line so looking to make those visualization a little more interactive or readable/organized by coding some SwiftUI stuff around those current visualizations. Anyway.

Looking around this doesn't seem to be a thing people normally do. I'm not sure how to setup the Terminal Command Line Tool code that I wrote to optionally launch into SwiftUI code.