devkit: multiple UI prompts when running web-worker sample

[davidchesnut]

After using the devkit to create a project from the Excel-Add-in-Custom-Function-Using-WebWorker there are multiple UI prompts that are not documented and are confusing.

To Reproduce

On Windows 11.

Steps to reproduce the behavior:

1. Use the devkit to create a new project from Excel-Add-in-Custom-Function-Using-WebWorker.
2. Choose "Preview your Office Add-in" and Excel (Edge Chromium)

At this point you will see the following popup window in VS Code.

When the web server is running that prompt goes away. This could be confusing to a developer thinking they should click on something.

Next the terminal window will show:

Should we document this?

Next you will see the following popup from Windows 11.

When you click OK Excel finally shows the task pane.

The custom functions do not work. So the sample is broken.

When you close Excel you see the following prompt in VS Code

Again confusing if the developer should do anything but it goes away once debugger is shut down.

[davidchesnut]

Moved to OfficeDev/Office-Samples#100