Move keybindings to a different file

+keybindings.el

@@ -0,0 +1,9 @@
+;;; +keybindings.el -*- lexical-binding: t; -*-
+;; Custom keybindings
+;;
+;; Select target in Makefile compilation as default
+(map! :leader :n "c c" #'makefile-executor-execute-project-target)
+;; Keybindings for R markdown polymode
+(map! :map poly-markdown+R-mode-map
+      :n "RET" #'polymode-eval-chunk
+      :desc "Evaluate code block")