Add ykman for YubiKey configuration
Add ykman for YubiKey configuration

Needed to turn off Yubico OTP with:
ykman mode FIDO+CCID

I won't use Yubico OTP, and it's annoying when pressing the YubiKey by
accident results in the the OTP being typed and entered.

dguo/dotfiles,dguo/dotfiles,dguo/dotfiles