Support multiple IP addresses from hostname -I

If docker is running multiple IP addresses are returned by hostname -I,
we take the first one now.

Also if we update the IP address and it's shorter (in characters) than
the last IP address we have a corrupt wsl line, we now add a couple
empty lines to try and mitigate that.

To install and run, download a binary from the releases tab. Place it somewhere like your Documents/ folder.

Open an elevated/administrator command prompt:

> .\go-wsl2-host.exe install
Windows Username: <username-you-use-to-login-to-windows>
Windows Password: <password-for-this-user>