Doom Emacs w/ Personal Config

- Update flake.lock
- Add doom emacs nix module to flake
- Change default editor to doom emacs
- Move xdg configuration to a separate file
- Change user home filepaths to use `~`
- Install doom emacs by default
- Add personal doom emacs configuration

user/development/default.nix

@@ -3,5 +3,6 @@
 {
   imports = [
     ./vscode.nix
+    ./doom-emacs.nix
   ];
 }

user/development/doom-emacs.nix

@@ -0,0 +1,8 @@
+{ config, lib, pkgs, ... }:
+
+{
+  programs.doom-emacs = {
+    enable = true;
+    doomPrivateDir = ~/.config/doom-emacs-config;
+  };
+}