Update NixOS configuration

home/terminal/software/opencode/_languages.nix

@@ -18,6 +18,7 @@ in {
   packages = with pkgs; [
     astro-language-server
     biome
+    kotlin-language-server
     marksman
     nil
     tailwindcss-language-server
@@ -59,6 +60,10 @@ in {
       command = [lspBins.nil];
       extensions = ["nix"];
     };
+    kotlin = {
+      command = ["kotlin-language-server"];
+      extensions = ["kt" "kts"];
+    };
     marksman = {
       command = [lspBins.marksman];
       extensions = ["md"];

home/terminal/software/opencode/default.nix

@@ -94,7 +94,7 @@ in {
           "zai"
           "zenmux"
         ];
-        enabled_providers = [ "opencode" "google" "openrouter" ];
+        enabled_providers = [ "opencode" "google" "openrouter" "deepseek" "nvidia" "alibaba" "mistral" "cloudflare-workers-ai" ];
         mcp = {
           gh_grep = {
             type = "remote";