feat: update VSCodium configuration

feat: add nil language server
refactor: remove unnecessary ssh config content

modules/home/common/ssh/default.nix

@@ -5,37 +5,8 @@
   namespace,
   config,
   ...
-}: let
-  sshDir = "${config.home.homeDirectory}/.ssh";
-in {
+}: {
   home.packages = with pkgs; [
     openssh
   ];
-
-  programs.ssh = {
-    enable = true;
-    extraConfig = ''
-      AddKeysToAgent yes
-    '';
-
-    matchBlocks = {
-      "github.com" = {
-        identityFile = "${sshDir}/id_ed25519";
-        identitiesOnly = true;
-        user = "git";
-      };
-
-      "gitlab.com" = {
-        identityFile = "${sshDir}/id_ed25519";
-        identitiesOnly = true;
-        user = "git";
-      };
-
-      "bitbucket.org" = {
-        identityFile = "${sshDir}/id_ed25519";
-        identitiesOnly = true;
-        user = "git";
-      };
-    };
-  };
 }

modules/nixos/common/nix/default.nix

@@ -32,6 +32,11 @@ in {
         options = "--delete-older-than 3d";
       };
 
+      extraOptions = ''
+        extra-substituters = https://devenv.cachix.org
+        extra-trusted-public-keys = devenv.cachix.org-1:w1cLUi8dv3hnoSPGAuibQv+f9TZLr6cv/Hm9XgU50cw=
+      '';
+
       package = mkIf cfg.use-lix pkgs.lix; # Enable LIX
     };
   };