refactor!: restructure and document configuration

modules/emacs/default.nix

@@ -0,0 +1,33 @@
+{ pkgs, ... }:
+
+{
+  home.packages = with pkgs; [
+    # CORE
+    git
+    emacs
+    ripgrep
+
+    # Optional for DOOM
+    clang
+    coreutils
+    fd
+
+    pandoc # For org-pandoc
+    (aspellWithDicts (
+      dicts: with dicts; [
+        en
+        pt_BR
+      ]
+    )) # for flyspell
+    gnuplot_qt # for plotting graphs
+    languagetool # for grammar
+    ledger # for accounting and org-ledger
+    gzip # Otherwise random errors occur from the onChange script
+  ];
+
+  # Neatly place the configuration files for doom in their right place.
+  xdg.configFile."doom" = {
+    source = ./doom;
+    recursive = true;
+  };
+}