Standardize REPL commands & improve SPC o r

- SPC o r now prompts for a REPL to open when none was found for the
  current buffer.
- REPL handlers must now follow the naming convention "*/open*-repl".
  e.g. +python/open-ipython-repl, +emacs-lisp/open-repl, etc.
- +eval/open-repl has been split in two:
  - +eval/open-repl-other-window
  - +eval/open-repl-same-window

modules/feature/eval/autoload/settings.el

@@ -6,7 +6,7 @@
 ;;;###autoload
 (defvar +eval-repls nil
   "An alist mapping major modes to plists that describe REPLs. Used by
-`+eval/open-repl' and filled with the `:repl' setting.")
+`+eval/open-repl-other-window' and filled with the `:repl' setting.")
 
 ;;;###autodef
 (defun set-repl-handler! (modes command)