Add basic idris support

modules/lang/idris/README.org

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+#+TITLE: :lang idris
+
+Adds support for the [[https://www.idris-lang.org/][idris]] programming language.  

modules/lang/idris/config.el

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+;;; lang/idris/config.el -*- lexical-binding: t; -*-
+
+(def-package! idris-mode
+  :config
+  (add-hook! 'idris-mode-hook 'turn-on-idris-simple-indent)
+  (set-repl-handler! 'idris-mode 'idris-pop-to-repl)
+  (map! :map idris-mode-map
+        :localleader
+        :n "r" #'idris-load-file
+        :n "t" #'idris-type-at-point
+        :n "d" #'idris-add-clause
+        :n "l" #'idris-make-lemma
+        :n "c" #'idris-case-split
+        :n "w" #'idris-make-with-block
+        :n "m" #'idris-add-missing
+        :n "p" #'idris-proof-search
+        :n "h" #'idris-docs-at-point))

modules/lang/idris/packages.el

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+;; -*- no-byte-compile: t; -*-
+;;; lang/idris/packages.el
+
+(package! idris-mode)