Add .snapshot directory via btrfs

nixos/hosts/framework-server/disks.nix

@@ -47,6 +47,10 @@
                   mountpoint = "/nix";
                   mountOptions = [ "compress=zstd" "noatime" ];
                 }; # nix
+                "/.snapshots" = {
+                  mountpoint = "/.snapshots";
+                  mountOptions = [ "compress=zstd" "noatime" ];
+                }; # .snapshots
                 # Re-add this on the next refomrat 
                 # "/Storage" = {
                 #   mountpoint = "/Storage";