feat: init project with some starter Go code

devenv.nix

@@ -0,0 +1,84 @@
+{
+  pkgs,
+  lib,
+  config,
+  inputs,
+  ...
+}:
+
+{
+  name = "ai-game";
+  # https://devenv.sh/basics/
+  env = {
+    GREET = "🛠️ Let's hack ";
+  };
+
+  # https://devenv.sh/scripts/
+  scripts = {
+    hello.exec = "echo $GREET";
+    cat.exec = "bat $@";
+
+    show = {
+      # Prints scripts that have a description
+      # Adapted from https://github.com/cachix/devenv/blob/ef61728d91ad5eb91f86cdbcc16070602e7afa16/examples/scripts/devenv.nix#L34
+      exec = ''
+        GREEN="\033[0;32m";
+        YELLOW="\033[33m";
+        NC="\033[0m";
+        echo
+        echo -e "✨ Helper scripts you can run to make your development richer:"
+        echo
+        ${pkgs.gnused}/bin/sed -e 's| |••|g' -e 's|=| |' <<EOF | ${pkgs.util-linuxMinimal}/bin/column -t | ${pkgs.gnused}/bin/sed -e "s|^\([^ ]*\)|$(printf "$GREEN")\1$(printf "$NC"):    |" -e "s|^|$(printf "$YELLOW*$NC") |" -e 's|••| |g'
+        ${lib.generators.toKeyValue { } (
+          lib.mapAttrs (name: value: value.description) (
+            lib.filterAttrs (_: value: value.description != "") config.scripts
+          )
+        )}
+        EOF
+        echo
+      '';
+      description = "Print this message and exit.";
+    };
+
+  };
+
+  # https://devenv.sh/packages/
+  packages = with pkgs; [
+    nixfmt-rfc-style
+    bat
+    jq
+    tealdeer
+    gopls
+    air
+  ];
+
+  languages = {
+    go.enable = true;
+
+  };
+
+  enterShell = ''
+    hello
+    show'';
+
+  # https://devenv.sh/pre-commit-hooks/
+  pre-commit.hooks = {
+    nixfmt-rfc-style = {
+      enable = true;
+      excludes = [ ".devenv.flake.nix" ];
+    };
+    yamllint = {
+      enable = true;
+      settings.preset = "relaxed";
+    };
+  };
+
+  # Make diffs fantastic
+  difftastic.enable = true;
+
+  # https://devenv.sh/integrations/dotenv/
+  dotenv.enable = true;
+
+  # https://devenv.sh/integrations/codespaces-devcontainer/
+  devcontainer.enable = true;
+}