Add docs explaining current method of adding SPA hosting to an ASP.NET Core Application

We have recently updated our app to ASP.NET core 8 from and old version and I've been trying to find the current recommended way to add a SPA page after reading that it changed between version 5 and 6. Currently the only docs are about starting a new project:
https://learn.microsoft.com/en-us/visualstudio/javascript/tutorial-asp-net-core-with-angular?view=vs-2022
Trying to pull apart a template project to figure out the diff is a painful developer experience.

A topic with a concise list of changes required to host a SPA is needed. It could still go under "Learn/Visual Studio/Tutorials".
It will help developers with existing projects figure out what the minimal changes are to add SPA hosting to their application.

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[Associated WorkItem - 346684](https://dev.azure.com/msft-skilling/Content/_workitems/edit/346684)