Add progress reporting for new project creation

[Octogonapus]

Expected Behavior:

New project creation should report its progress (even if that is just "in progress" and "complete").

Actual Behavior:

New project creation is silent.

Steps to reproduce:

1. Create a new project in the PROS Editor.
2. The editor does nothing until the new project is fully created.

System information:

Operating System: macOS

PROS Version: ¯\_(ツ)_/¯

[HotelCalifornia]

Rather than progress, a simply busy spinner should suffice I think. Shouldn't be too hard to add as an interactive UI component (assuming there isn't already one; I can't remember off the top of my head).

For what it's worth, the template acquisition (if necessary) and application to a new project should already report progress in notifications.

[Octogonapus]

For what it's worth, the template acquisition (if necessary) and application to a new project should already report progress in notifications.

Template acquisition works as expected.

[kunwarsahni01]

This is a plugin bug on macOS, new project creation does show reporting on windows.