Feature: Add windows package manager package collection to Tern

[rnjudge]

Describe the Feature Windows offers a Docker base image. Once Tern is enabled to run in a container on Windows, we might look in to enabling windows package collection for a windows host os/container.

Implementing this feature first depends on successfully completing #679. As of this writing, Tern cannot run natively in a container on windows. Until it can, this feature is irrelevant as Windows requires the host OS version to match the container OS version.

Use Cases When running Tern for a windows-based container.

Implementation Changes Add a snippet to tern/command_lib/snippets.py and an entry to tern/command_lib/base.yml to collect windows package information. There might be a couple options for this (Chocolatey or OneGet) Might also need to add windows powershell to the list of available shells in Tern.

Blockers: #679