Add :lang beancount module

modules/lang/beancount/config.el

@@ -0,0 +1,29 @@
+;;; lang/beancount/config.el -*- lexical-binding: t; -*-
+
+(use-package! beancount-mode
+  :mode "\\.beancount\\'"
+  :init
+  (add-hook 'beancount-mode-hook #'outline-minor-mode)
+
+  (after! all-the-icons
+    (add-to-list 'all-the-icons-icon-alist
+                 '("\\.beancount\\'" all-the-icons-material "attach_money" :face all-the-icons-lblue))
+    (add-to-list 'all-the-icons-mode-icon-alist
+                 '(beancount-mode all-the-icons-material "attach_money" :face all-the-icons-lblue)))
+  :config
+  (when (featurep! +lsp)
+    (add-hook 'beancount-mode-local-vars-hook #'lsp!))
+
+  (setq beancount-electric-currency t)
+
+  (map! :map beancount-mode-map
+        :localleader
+        "b" #'+beancount/balance
+        "c" #'beancount-check
+        "l" #'beancount-linked
+        "q" #'beancount-query
+        "x" #'beancount-context
+        (:prefix ("i" . "insert")
+         "a" #'beancount-insert-account
+         "p" #'beancount-insert-prices
+         "d" #'beancount-insert-date)))