Add treefmt

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/common/configs/system/impermanence/scripts/start.sh

@@ -1,3 +1,6 @@
+# shellcheck shell=bash
+
+# shellcheck disable=SC2154
 echo "Starting impermanence mount with source: $source, target: $target, path: $path."
 
 source_current="$source"

hosts/common/configs/system/impermanence/scripts/stop.sh

@@ -1,3 +1,6 @@
+# shellcheck shell=bash
+
+# shellcheck disable=SC2154
 echo "Stopping impermanence mount with source: $source, target: $target, path: $path."
 
 source_current="$source"

hosts/common/configs/system/impermanence/scripts/wipe.sh

@@ -1,3 +1,5 @@
+# shellcheck shell=bash
+
 delete_subvolume_recursively() {
   IFS=$'\n'
   for i in $(btrfs subvolume list -o "$1" | cut -f 9- -d ' '); do