feat(niri,xbacklight): Brightness control

hosts/fruitbook/configuration.nix

@@ -11,6 +11,7 @@
     wifi.enable = true;
     stylix.enable = true;
     niri.enable = true;
+    xbacklight-permissions.enable = true;
     users.users = [
       "crumb"
     ];

hosts/fruitbook/disks.nix

@@ -1,73 +0,0 @@
-# sudo nix --experimental-features "nix-command flakes" run github:nix-community/disko/latest -- --mode disko /persist/dots/hosts/nixos-testbed/disko-config.nix
-# time sudo nixos-install --flake /persist/dots#nixos-testbed
-{ lib, ... }:
-{
-  # imports = [ disko.nixosModules.disko ];
-  boot.initrd.supportedFilesystems.btrfs = true;
-  boot.supportedFilesystems.btrfs = true;
-
-  # From Impermanence's README: "Important note: Make sure your persistent
-  # volumes are marked with neededForBoot, otherwise you will run into
-  # problems."
-  fileSystems."/persist".neededForBoot = true;
-
-  disko.devices = {
-    disk = {
-      bootroot = {
-        type = "disk";
-        device = "/dev/disk/by-id/ata-APPLE_SSD_SM0512G_S29ANYAH526520-part4";
-        content = {
-          type = "gpt";
-          partitions = {
-            ESP = {
-              size = "512M";
-              type = "EF00";
-              content = {
-                type = "filesystem";
-                format = "vfat";
-                mountpoint = "/boot";
-                mountOptions = [ "umask=0077" ];
-              };
-            };
-            root = {
-              size = "100%";
-              content = {
-                type = "btrfs";
-
-                mountpoint = "/partition-root";
-                swap.swapfile.size = "4G";
-
-                # Override existing partitions.
-                extraArgs = [ "-f" ];
-
-                # Subvolumes must set a mountpoint in order to be mounted,
-                # *unless their parent is mounted*.
-                subvolumes = {
-                  # Subvolume names do not necessarily correspond to
-                  # mountpoints, despite the structural resemblance to a file
-                  # path.
-                  "/rootfs" = {
-                    mountpoint = "/";
-                  };
-                  "/nix" = {
-                    mountpoint = "/nix";
-                  };
-                  "/persist" = {
-                    mountpoint = "/persist";
-                  };
-                  "/persist/home" = {
-                    mountpoint = "/persist/home";
-                  };
-                  "/swap" = {
-                    mountpoint = "/.swapvol";
-                    swap.swapfile.size = "4G";
-                  };
-                };
-              };
-            };
-          };
-        };
-      };
-    };
-  };
-}