Working on Emacs

- now my custom Emacs package lives inside `pkgs/`
- small org-mode updates
- added custom Emacs commands to rebuild NixOS

pkgs/emacs/default.nix

@@ -0,0 +1,38 @@
+{ pkgs, ... }:
+let
+  myEmacs = pkgs.emacsPgtkGcc;
+  emacsWithPackages = (pkgs.emacsPackagesFor myEmacs).emacsWithPackages;
+in
+emacsWithPackages (
+  epkgs: (
+    with epkgs.melpaStablePackages; []
+  ) ++ (
+    with epkgs.melpaPackages; [
+      all-the-icons
+      use-package
+      evil
+      evil-collection
+      helm
+      projectile
+      magit
+      fira-code-mode
+      org-superstar
+      nix-mode
+      lispy
+      lsp-mode
+      dap-mode
+      which-key
+      sudo-utils
+      treemacs
+      treemacs-evil
+      treemacs-projectile
+      treemacs-icons-dired
+      treemacs-magit
+      treemacs-persp
+    ]
+  ) ++ (
+    with epkgs.elpaPackages; [
+      modus-themes
+    ]
+  ) ++ []
+)