canokey-qemu: init at unstable-2022-06-23 and add QEMU support

[oxalica]

Description of changes

This PR introduced an option canokeySupport to enable simulation for CanoKey via -device canokey. It enables testing GPG Card, U2F, FIDO2 and etc in QEMU VM. Since it pulls in a 3rd-party package dependency, it's disabled by default.
Refs:

1. CanoKey, an open-source secure key. https://www.canokeys.org/
2. QEMU docs for CanoKey support. https://qemu.readthedocs.io/en/latest/system/devices/canokey.html

Manually tested with qemu.override { canokeySupport = true; hostCpuOnly = true; }.

I'm currently put it under pkgs/applications/virtualization/qemu since it's for QEMU only. Not sure if there's a better place for it.

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Result of nixpkgs-review run on x86_64-linux 1

1 package built:

• canokey-qemu

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 22.11 Release Notes (or backporting 22.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
  • (Release notes changes) Ran nixos/doc/manual/md-to-db.sh to update generated release notes
• Fits CONTRIBUTING.md.