use poper emacs namespace, move keys to dedicated minor mode

lang/purescript.el

@@ -0,0 +1,31 @@
+;;; purescript.el --- summary
+
+;; Author: Maciej Szlosarczyk
+;; Maintainer: Maciej Szlosarczyk
+;; Version: 0.1-snapshot
+
+;;; Commentary:
+
+;; purescript does a thing.
+
+;;; Code:
+(use-package purescript-mode
+  :requires (lsp-mode lsp-ui)
+  :ensure t)
+
+(defun activate-purescript-mode ()
+  "All things Purescript."
+  (set-indent 2)
+  (column-enforce-n 98)
+
+  ;; Purescript indentation
+  (purescript-indentation-mode t)
+
+  ;; Company list override
+  (add-to-list (make-local-variable 'company-backends)
+               '(company-capf company-yasnippet)))
+
+(add-hook 'purescript-mode-hook 'activate-purescript-mode)
+
+(provide 'icejam-lang-purescript)
+;;; purescript.el ends here