Replace `wmic` stuff in README and add library like `sysinfo`

[LukeSaward]

On Windows 11, which is the OS most people are using now due to Windows 10 now being generally EOS, wmic is disabled by default, and we ideally don't want people to have to enable wmic to use the tool.

So we want to use a crate such as sysinfo to handle getting the process for us.

[spinerak]

Heyo @LukeSaward We just had a bug-fixing session in the AP discord which turned out to be this issue. We solved it using this pull-request (on my AP fork), perhaps it makes it easier for you to solve the problem too :) https://github.com/spinerak/refunct-tas-archipelago/pull/3/files