add yubikey for arch

arch.md

@@ -46,6 +46,7 @@
     - [Wine](#wine)
     - [Spotify](#spotify)
     - [Kubectl](#kubectl)
+    - [Yubikey](#yubikey)
   - [Bashrc](#bashrc)
   - [Unecessary](#unecessary)
     - [Plymouth Background Image](#plymouth-background-image)
@@ -963,6 +964,20 @@ cat vscode_extensions.txt | xargs -L 1 code --install-extension
 
 `pacman -S kubectl`
 
+### Yubikey
+
+You'll need the yubikey manager appimage in addition to the pacman package
+
+```bash
+sudo pacman -S yubikey-manager
+```
+
+Reboot and things should work. You might also have to start pcscd:
+
+```bash
+sudo systemctl enable --now pcscd
+```
+
 ## Bashrc
 
 ~/.bashrc