use dotnet module in rider module

hosts/modules/apps/rider.nix

@@ -1,30 +1,19 @@
 {
   pkgs,
   pkgs-unstable,
+  dotnetVersions ? [8 9 10],
   ...
 }: {
+  imports = [
+    ../langs/dotnet.nix
+  ];
+
   environment.systemPackages = with pkgs; [
     # Ensure latest stable Rider version (not necessarily stable on NixOS)
     pkgs-unstable.jetbrains.rider
 
     # NOTE: Blazor requires a Chromium-based browser
     chromium
-    # arc-browser
-
-    # .NET
-    dotnetCorePackages.dotnet_9.sdk
-    dotnetCorePackages.dotnet_9.aspnetcore
-    dotnetCorePackages.dotnet_9.runtime
-
-    # Mono
-    mono
-    # NOTE: nixpkgs-unstable uses .NET8 SDK
-    # WARNING: nixpkgs-25.05 uses .NET6 SDK (now marked insecure)
-    pkgs-unstable.msbuild
-
-    # .NET Framework Tools/Services
-    omnisharp-roslyn
-    netcoredbg
   ];
 
   programs.nix-ld = {