installer: add deprecation warning about sd-card file move

nixos/modules/installer/cd-dvd/sd-image-aarch64-new-kernel.nix

@@ -1,5 +1,14 @@
+{ config, ... }:
 {
   imports = [
     ../sd-card/sd-image-aarch64-new-kernel-installer.nix
   ];
+  config = {
+    warnings = [
+      ''
+      .../cd-dvd/sd-image-aarch64-new-kernel.nix is deprecated and will eventually be removed.
+      Please switch to .../sd-card/sd-image-aarch64-new-kernel-installer.nix, instead.
+      ''
+    ];
+  };
 }

nixos/modules/installer/cd-dvd/sd-image-aarch64.nix

@@ -1,5 +1,14 @@
+{ config, ... }:
 {
   imports = [
     ../sd-card/sd-image-aarch64-installer.nix
   ];
+  config = {
+    warnings = [
+      ''
+      .../cd-dvd/sd-image-aarch64.nix is deprecated and will eventually be removed.
+      Please switch to .../sd-card/sd-image-aarch64-installer.nix, instead.
+      ''
+    ];
+  };
 }

nixos/modules/installer/cd-dvd/sd-image-armv7l-multiplatform.nix

@@ -1,5 +1,14 @@
+{ config, ... }:
 {
   imports = [
     ../sd-card/sd-image-armv7l-multiplatform-installer.nix
   ];
+  config = {
+    warnings = [
+      ''
+      .../cd-dvd/sd-image-armv7l-multiplatform.nix is deprecated and will eventually be removed.
+      Please switch to .../sd-card/sd-image-armv7l-multiplatform-installer.nix, instead.
+      ''
+    ];
+  };
 }

nixos/modules/installer/cd-dvd/sd-image-raspberrypi.nix

@@ -1,5 +1,14 @@
+{ config, ... }:
 {
   imports = [
     ../sd-card/sd-image-raspberrypi-installer.nix
   ];
+  config = {
+    warnings = [
+      ''
+      .../cd-dvd/sd-image-raspberrypi.nix is deprecated and will eventually be removed.
+      Please switch to .../sd-card/sd-image-raspberrypi-installer.nix, instead.
+      ''
+    ];
+  };
 }

nixos/modules/installer/cd-dvd/sd-image-raspberrypi4.nix

@@ -1,5 +1,14 @@
+{ config, ... }:
 {
   imports = [
     ../sd-card/sd-image-raspberrypi4-installer.nix
   ];
+  config = {
+    warnings = [
+      ''
+      .../cd-dvd/sd-image-raspberrypi4.nix is deprecated and will eventually be removed.
+      Please switch to .../sd-card/sd-image-raspberrypi4-installer.nix, instead.
+      ''
+    ];
+  };
 }

nixos/modules/installer/cd-dvd/sd-image.nix

@@ -1,5 +1,14 @@
+{ config, ... }:
 {
   imports = [
     ../sd-card/sd-image.nix
   ];
+  config = {
+    warnings = [
+      ''
+      .../cd-dvd/sd-image.nix is deprecated and will eventually be removed.
+      Please switch to .../sd-card/sd-image.nix, instead.
+      ''
+    ];
+  };
 }