feat(prolog): Add flake

prolog/flake.nix

@@ -0,0 +1,27 @@
+{
+  description = "SWI-Prolog";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+  flake-utils.lib.eachDefaultSystem (system:
+  let
+    pkgs = import nixpkgs {
+      inherit system;
+      config.allowUnfree = true;
+    };
+  in {
+    devShells.default = pkgs.mkShell {
+      buildInputs = with pkgs; [
+        swi-prolog
+
+        # Editor
+        #(jetbrains.plugins.addPlugins jetbrains.idea-ultimate [ "github-copilot" ])
+        vscodium
+      ];
+    };
+  });
+}