Fixes #37; this adds a Python file to add and sync across the hosts, dnsmasq, and the PiHole files, and remove any duplicates if present

Changes

• Fix indentation on dnsmasq
• Add a PowerShell script to add them to the hosts file and create a hosts.bak as a backup
• Dedupe logic
• Sort the list in alphabetical order
• Add an issue template for users to file for new domains and possibly GitHub workflow to create a PR from the IP addresses/domains specified
• Add a workflow on every push and execute python lists.py --remove-duplicates