Github Actions for Windows CI

[sekineh]

Closes #113

This PR will enable CI test on Windows platform using GitHub actions. It builds and tests in three feature configurations:

• default features (no --features flag)
• --features tokio
• --features full

Used pcap version is:

• WinPcap 4.1.3 + WpdPack 4.1.2 (npcap is not tested in CI because It does not support silent install.)

Other notes:

• Parallel build is easy but we didn't do that. WinPcap installation is AutoHotKey-based and takes more than 3.5 min. I don't want to replicate this cpu time. GHA free tier permits 2000 min / month for linux but for Windows, the limit is 1000 min / month.
  • https://docs.github.com/ja/github/setting-up-and-managing-billing-and-payments-on-github/about-billing-for-github-actions

[sekineh]

Note: they say silent install of npcap is only available in Npcap OEM.
microsoft/winget-pkgs#468 (comment)

I'm going to use WinPcap which I've successfully installed silently before:
https://github.com/sekineh/pcap-alt/blob/315c846928a95e04e590f87ef9b5e9c6d34608e5/appveyor.yml#L42

[sekineh]

@Wojtek242 , I think it's ready to be reviewed.

[Wojtek242]

Looks good to me!