Add a netcore console app project template

[jason-c-daniels]

Request
Add a project template for standalone .NET (Core) console applications.

Description
I would like a command similar to classlib (perhaps just app) that will generate a .NET (Core) application, defaulting to .NET 6, with an option to let me select an older version.

Some sample executions are below:

# Create the app and repo locally, not pushing to GItHub, and targeting .NET 6.
jcd-new console-app --no-github --project-name=My.Cool.App

# Create the app targeting .NET 5, and push it to GitHub right away.
jcd-new console-app --project-name=My.Cool.But.Older.App --net-app-version=net5.0

# Create the app targeting .NET Core 3.1, and push it to GitHub right away.
jcd-new console-app --project-name=My.Cool.But.Much.Older.App --net-app-version=netcoreapp3.1

Describe alternatives you've considered

• The output from jcd-new classlib could be used to house just the solution and then manually create the application type I want. That would get me the rest of the scaffolding. But the template for the README.md is clearly geared towards libraries, not apps.