x64-linux-dev: add nixos-vscode-server for remote development

this module is merely for patching the binaries that are installed by
vscodium's remote-SSH plugin. it doesn't provide any actual servers.

flake.nix

@@ -116,6 +116,8 @@
     holoNixpkgs.url = "https://hydra.holo.host/channel/custom/holo-nixpkgs/2112/holo-nixpkgs/nixexprs.tar.xz";
 
     nixpkgsPulumi.url = "github:steveej-forks/nixpkgs/pulumi-version-bump";
+
+    nixos-vscode-server.url = "github:nix-community/nixos-vscode-server";
   };
 
   outputs = inputs @ {

modules/flake-parts/nixosConfigurations.x64-linux-dev-01/configuration.nix

@@ -27,6 +27,9 @@ in {
       home-manager.users.dev = {pkgs, ...}: {
         home.packages = [
           # additional packages for this user go here
+          pkgs.nil
+          pkgs.wget
+          pkgs.file
         ];
       };
 
@@ -40,6 +43,31 @@ in {
     {
       services.devMinio.enable = true;
     }
+
+    inputs.nixos-vscode-server.nixosModules.default
+    ({
+      config,
+      pkgs,
+      ...
+    }: {
+      /*
+      FIXME
+        there's issue when the vscodium SSH-remote extension has a non-default setting for `"remote.SSH.experimental.serverBinaryName": "openvscode-server",
+        it can be worked around by creating a symlink on the remote server:
+
+        ```
+        [dev@x64-linux-dev-01:~/.vscodium-server/bin/0d01a72525276e5e3771fe5851b9c83de0de1e2b/bin]$ ln -s /home/dev/.vscodium-server/bin/0d01a72525276e5e3771fe5851b9c83de0de1e2b/bin/{codium,openvscode}-server
+        ```
+      */
+      services.vscode-server = {
+        enable = true;
+        installPath = "$HOME/.vscodium-server";
+        nodejsPackage = pkgs.nodejs_18;
+        extraRuntimeDependencies = [
+          pkgs.stdenv.cc.cc.lib
+        ];
+      };
+    })
   ];
 
   nix.settings.system-features = [