Update to `stop:npm-proxy` for Windows

[ShadowCat567]

Problem

npm:stop-proxy command was unable to be run without an error on Windows, so verdaccio process could not be killed. This stems from lsof command not existing on Windows.

Issue number, if available:

Changes

• Added check to see if user is running stop-npm-proxy.ts on Windows machine
• if user is using Windows machine, uses alternative command (netstat was the best equivalent to lsof that I could find for windows) to find PID of verdaccio so the process can be killed
• added netstat to eslint dictionary to get spellcheck rule to stop complaining

Corresponding docs PR, if applicable:

Validation

Checked that process running on verdaccio port is killed after stop:npm-proxy command is run

Checklist

• [ ] If this PR includes a functional change to the runtime behavior of the code, I have added or updated automated test coverage for this change.
• [ ] If this PR requires a change to the Project Architecture README, I have included that update in this PR.
• [ ] If this PR requires a docs update, I have linked to that docs PR above.
• [ ] If this PR modifies E2E tests, makes changes to resource provisioning, or makes SDK calls, I have run the PR checks with the run-e2e label set.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

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