(GH-132)(GH-131) Add context menu for *.nupkg and *.nuspec and 'choco new' in Finder window

[steviecoaster]

Description

Adds a right-click context menu for creating new packages when folder is selected, or pushing when a nupkg is selected.

Related Issue

#132
#131

Motivation and Context

Mostly....because I can

How Has This Been Tested?

Ran in VSCode extension debugger.

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[AdmiringWorm]

Please do correct me if I am wrong, but isn't there also a need to change the code itself?
Otherwise you would still be prompted to select a nupkg/nuspec file.

[steviecoaster]

Please do correct me if I am wrong, but isn't there also a need to change the code itself?
Otherwise you would still be prompted to select a nupkg/nuspec file.

Yes, there is more work to be done before we merge this in, but I need to have a quick chat with Gary about those changes before proceeding.

[corbob]

Switching this to draft PR based on the previous comments regarding additional code changes needed.