feat(uConsole): add disko, backlight fix, GPIO 23, mt7921u

- Add disko flake input + partition config (/boot/firmware, /, /home)
- Add cm5-backlight-fix service as display fallback
- Add enable-gpio23-usb-hub service for internal USB hub
- Add mt7921u kernel module for MediaTek AC1200 WiFi
- Add gpiod package for GPIO userspace control

flake.nix

@@ -8,6 +8,10 @@
       inputs.darwin.follows = "";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+    disko = {
+      url = "github:nix-community/disko";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
     lix = {
       url = "git+https://git.lix.systems/lix-project/lix?ref=main";
       inputs.nixpkgs.follows = "nixpkgs";
@@ -23,7 +27,7 @@
     self.submodules = true;
   };
 
-  outputs = { self, nixpkgs, agenix, lix, nixos-uconsole, nixos-raspberrypi, ... }@inputs:
+  outputs = { self, nixpkgs, agenix, disko, lix, nixos-uconsole, nixos-raspberrypi, ... }@inputs:
     let
       system = "x86_64-linux";
       keys = import ./lib/keys.nix;
@@ -100,8 +104,10 @@
               }
               nixos-raspberrypi.nixosModules.raspberry-pi-5.base
               nixos-uconsole.nixosModules.uconsole-cm5
+              disko.nixosModules.disko
               ./hosts/uConsole/configuration.nix
               ./hosts/uConsole/hardware-configuration.nix
+              ./hosts/uConsole/disko-config.nix
             ];
           };
         };