feat(snapper): Add manual snap script

Can be run before dangerous commands to create a quick backup of the
system before running it.

books/files/snapper-snap-script

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+CONFIG="${SNAP_CONFIG:-root}"
+
+echo RUNNING: snapper --config="$CONFIG" --quiet create --description="${*//sudo /}" --cleanup-algorithm="number"
+
+"$@"

books/void_base.yaml

@@ -188,6 +188,14 @@
         mode: 0640
         force: true
 
+    - name: Add snap manual safety command
+      ansible.builtin.copy:
+        src: snapper-snap-script
+        dest: "/usr/bin/snap"
+        owner: root
+        group: root
+        mode: 0755
+
   handlers:
   #   # Do NOT activate the snapperd service -
   #   # on systems without elogind I guess? Unsure