Move move .emacs.d out of configs/shared

Moving all of my Emacs-related files into their own directory at the root of
this repository.

emacs/.emacs.d/wpc/wpc-shell.el

@@ -0,0 +1,17 @@
+;;; wpc-shell.el --- POSIX Shell scripting support -*- lexical-binding: t -*-
+;; Author: William Carroll <wpcarro@gmail.com>
+
+;;; Commentary:
+;; Helpers for my shell scripting. Includes bash, zsh, etc.
+
+;;; Code:
+
+(use-package flymake-shellcheck
+  :commands flymake-shellcheck-load
+  :init
+  (add-hook 'sh-mode-hook #'flymake-shellcheck-load))
+
+(use-package fish-mode)
+
+(provide 'wpc-shell)
+;;; wpc-shell.el ends here