Add python language server

modules/dev/default.nix

@@ -2,6 +2,7 @@
 
 {
   imports = [
+    ./python.nix
     ./rust.nix
   ];
 }

modules/dev/python.nix

@@ -0,0 +1,7 @@
+{ pkgs, ... }:
+
+{
+  environment.systemPackages = with pkgs; [
+    python37Packages.python-language-server
+  ];
+}