feat: switch from nix flakes to devenv

devenv.nix

@@ -0,0 +1,30 @@
+{ pkgs, lib, config, inputs, ... }:
+
+let
+  pkgs-unstable = import inputs.nixpkgs-unstable { system = pkgs.stdenv.system; };
+in {
+  packages = with pkgs; [
+    # General tools
+	git-cliff 
+    # Frontend tools
+    cypress 
+    # API tools
+    golangci-lint mage
+    # Desktop
+    electron
+  ];
+  
+  languages = {
+    javascript = {
+      enable = true;
+      pnpm = {
+        enable = true;
+        package = pkgs-unstable.pnpm;
+      };
+    };
+    
+    go = {
+      enable = true;
+    };
+  };
+}