Support V8 Snapshots on Windows

[DimitarTachev]

Is your feature request related to a problem? Please describe.
The --env.snapshot flag is not supported and throwing an exception on Windows.

Describe the solution you'd like
As we already have snapshots generation in a Docker container for macOS Catalina, we could reuse the same approach on Windows.

[endarova]

Acceptance criteria:

• when executing build with --env.snapshot flag on windows, a Docker usage message should be shown
• when executing build with --env.snapshot flag on windows without Docker, the process should exit with a Docker installation error
• when executing build with --env.snapshot flag on windows without running Docker server, the process should exit with a missing Docker server error
• when executing build with --env.snapshot flag on windows with running Docker server, the command should run successfully without any additional actions.
• with nativescript@6.1 and nativescript-dev-webpack@1.2.1 and earlier when executing build with --env.snapshot flag on windows message that snapshot flag is skipped should be shown