Added start:hass-cmd script for Windows CMD users

[greghesp]

Description

Windows users that are using CMD rather than Powershell are unable to use the current start:hass script due to PWD not working correctly in CMD

I have added a start:hass-cmd script that uses %cd% rather than PWD

Related Issue

Fixes #398

Motivation and Context

Allows development on Windows using CMD

How Has This Been Tested

Ran the script in CMD

Types of changes

• 🐛 Bug fix (non-breaking change which fixes an issue)
• 🚀 New feature (non-breaking change which adds functionality)
• 🌎 Translation (addition or update a translation)
• ⚠️ 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 tested the change locally.