Add a template for generating an empty solution, but with the rest of the scaffolding.

[jason-c-daniels]

Request
Add a template for generating an empty solution, but with the rest of the scaffolding for GitHub integration and linking of GitHub integration files into a solution folder.

Depends on #8

Description
I would like a command similar to classlib (perhaps just sln or solution or both) that will generate an empty solution file. It would also contain a README.md that doesn't mention class libraries or .NET Standard.

Some example executions are below:

# Create the solution and repo locally, not pushing to GitHub, and targeting .NET 6.
jcd-new sln --no-github --project-name=My.Cool.Project

# Create the solution and push to GitHub
jcd-new solutlon --project-name=My.Other.Cool.Project

Describe alternatives you've considered

• The output from jcd-new classlib could be used to generate the solution and I could scrap the projects it already generated. But this would take a lot longer to execute as the current script creates three projects, links them up, and then builds the output.