Refactor codebase to use nix modules

hmModules/services/home/default.nix

@@ -0,0 +1,38 @@
+{ config, pkgs, lib, ... }:
+
+{
+  options = {
+    extraPkgs = lib.mkOption { default = []; };
+  };
+
+  config = {
+    # Let Home Manager install and manage itself.
+    programs.home-manager.enable = true;
+
+    home.sessionVariables = {
+      GRADLE_USER_HOME = "${config.xdg.dataHome}/gradle";
+      CUDA_CACHE_PATH = "${config.xdg.cacheHome}/nv";
+    };
+
+    xdg = {
+      enable = true;
+      mimeApps.enable = true;
+      userDirs = let
+        home = config.home.homeDirectory;
+      in {
+        enable = true;
+        documents   = "${home}/dox";
+        publicShare = "${home}/dox/public";
+        templates   = "${home}/dox/templates";
+        music       = "${home}/med/mus";
+        pictures    = "${home}/med/pix";
+        videos      = "${home}/med/vid";
+        desktop     = "${home}/dwn";
+        download    = "${home}/dwn";
+      };
+    };
+
+    home.homeDirectory = "/home/" + config.home.username;
+    home.packages = config.extraPkgs;
+  };
+}