add qcow manipulation docs to arch workstation

arch/workstation.md

@@ -7,6 +7,8 @@
   - [Docker](#docker)
   - [QEMU/KVM](#qemukvm)
     - [Arch Guests](#arch-guests)
+    - [Restore qcow snapshots](#restore-qcow-snapshots)
+    - [Convert qcow to bootable drive](#convert-qcow-to-bootable-drive)
   - [Kubernetes](#kubernetes)
   - [VSCode](#vscode)
     - [Shell](#shell)
@@ -127,6 +129,29 @@ In order to get drivers for spice you'll need the guest spice drivers:
 sudo pacman -S qemu-guest-agent spice-vdagent
 ```
 
+### Restore qcow snapshots
+
+```bash
+# Create a snapshot
+qemu-img snapshot -c snapshot-name /var/lib/libvirt/images/vm-image.qcow2
+
+# List snapshots for a given image
+qemu-img snapshot -l /var/lib/libvirt/images/vm-image.qcow2
+
+# Restore snapshot
+qemu-img snapshot -a snapshot-name /var/lib/libvirt/images/vm-image.qcow2
+```
+
+### Convert qcow to bootable drive
+
+```bash
+qemu-img convert -f qcow2 -O raw /var/lib/libvirt/images/vm-image.qcow2 /dev/sdb
+```
+
+If you need to resize a windows partition to non-continuous space simply grow the
+last partition, shrink it to the end of the drive, then grow the windows partition
+with gparted.
+
 ## Kubernetes
 
 ```bash