Disko Flake Setup

- Add disko as input to flake
- Use diskoConfig flake variable to select disko configuration in configuration.nix

profiles/personal/configuration.nix

@@ -7,8 +7,7 @@
 {
   imports = [
     ../../system/hardware-configuration.nix
-    "${builtins.fetchTarball "https://github.com/nix-community/disko/archive/master.tar.gz"}/module.nix"
-    "../../disko/${systemSettings.diskoConfiguration}.nix"
+    "../../disko/" + systemSettings.diskoConfig
   ];
 
   nix = {
@@ -29,7 +28,7 @@
       grub = {
         enable = true;
         efiSupport = true;
-        device = "nodev";
+        efiInstallAsRemovable = true;
       };
     };
   };