Alright this ain't finished cause of the home stuff but I don't wanna lose what I've done. Impermanence, disko, lots of changes. TODO: add modularity to home.

modules/system/devices/impermanence/root/default.nix

@@ -0,0 +1,24 @@
+{ ... }:
+{
+  environment.persistence."/persist" = {
+    hideMounts = true;
+    directories = [
+      "/etc/nixos"
+      "/etc/secureboot"
+
+      "/var/log"
+      "/var/lib/bluetooth"
+      "/var/lib/mpd"
+      "/var/lib/nixos"
+      "/var/lib/fail2ban"
+      "/var/lib/systemd/coredump"
+    ];
+    files = [
+      "/etc/machine-id"
+      "/etc/ssh/ssh_host_ed25519_key"
+      "/etc/ssh/ssh_host_ed25519_key.pub"
+      "/etc/ssh/ssh_host_rsa_key"
+      "/etc/ssh/ssh_host_rsa_key.pub"
+    ];
+  };
+}