Rename perl module to raku.

It doesn't actually contain any Perl config.

modules/lang/raku/README.org

@@ -0,0 +1,11 @@
+#+TITLE: :lang raku
+
+This module adds a major mode and flycheck for Raku.
+
+* Table of Contents :TOC:
+- [[#install][Install]]
+
+* Install
+This module depends on raku itself.
+
+There are no other dependencies.

modules/lang/raku/config.el

@@ -0,0 +1,15 @@
+;;; lang/raku/config.el -*- lexical-binding: t; -*-
+
+
+
+(use-package! raku-mode
+  :defer t
+  :init
+  (defalias 'perl6-mode #'raku-mode)
+  :config
+  (set-repl-handler! 'raku-mode #'run-raku))
+
+
+(use-package! flycheck-raku
+  :when (featurep! :checkers syntax)
+  :after raku-mode)

modules/lang/raku/packages.el

@@ -0,0 +1,9 @@
+;; -*- no-byte-compile: t; -*-
+;;; lang/raku/packages.el
+
+(package! raku-mode :pin "d474216840251dc0efe4f4aa4f5c5f66ac26fa74")
+
+(when (featurep! :checkers syntax)
+  (package! flycheck-raku
+    :recipe (:host github :repo "widefox/flycheck-raku")
+    :pin "046f35abe0c61967157e151126e4dd7ec5d1c004"))