treewide: move nixos modules

modules/nixos/programs/hledger/default.nix

@@ -0,0 +1,33 @@
+{ config, lib, pkgs, ... }:
+
+{
+  options.chvp.programs.hledger.enable = lib.mkOption {
+    default = false;
+    example = true;
+  };
+
+  config = lib.mkIf config.chvp.programs.hledger.enable {
+    chvp.base.emacs.extraConfig = [
+      ''
+        ;; Ledger syntax support
+        (use-package ledger-mode
+         :mode "\\.journal\\'"
+         :custom
+         (ledger-binary-path "hledger" "Use hledger instead of ledger")
+         (ledger-highlight-xact-under-point nil "Remove distracting highlight")
+         (ledger-mode-should-check-version nil "Remove version check, since it doesn't work with hledger anyway")
+         (ledger-post-account-alignment-column 4 "Indent postings with 4 spaces")
+         (ledger-post-amount-alignment-at :decimal "Align on the decimal")
+         (ledger-post-amount-alignment-column 69 "Align on column 70")
+         (ledger-post-auto-align t "Align when moving to the next line")
+         :config
+         (advice-add 'ledger-complete-at-point :around #'cape-wrap-nonexclusive)
+         )
+      ''
+    ];
+
+    home-manager.users.charlotte = { ... }: {
+      home.packages = [ pkgs.hledger ];
+    };
+  };
+}