Add Codespace .NET dev environment for LodeRunner repo

[rcaseymsft]

Type of PR

• Documentation changes
• Code changes
• Test changes
• CI-CD changes
• GitHub Template changes
• Container configuration

PR Checklist

• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.
• My code follows the code style of this project.
• I ran lint checks locally prior to submission.
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Purpose of PR

• Update Codespace C# development environment for Burst metrics
  • Omnisharp settings update (global Roslyn settings and vscode specific)*
  • VSCode editorconfig support*
  • Added build tasks for LodeRunner.API, LodeRunner
  • Added launch settings for LodeRunner and LodeRunner.API
  • IDE improvements (sort using)
  • Added dotnet test explorer

Does this introduce a breaking change

• YES
• NO

Validation

• Unit tests updated and ran successfully
• Update documentation or issue referenced above

Issues Closed or Referenced

• Closes https://github.com/retaildevcrews/wcnp/issues/873

[AAkindele]

I was able to successfully test the new features that were described in the README.