Massive configuration overhaul

Currently paying the price of months of non-diligent git usage.

Here's what has changed.

- Theming support in Gvcci and wpgtk
- Dropping support for i3
- Supporting EXWM
- Many Elisp modules
- Collapsed redundant directories in ./configs

configs/shared/.emacs.d/snippets/emacs-lisp-mode/elisp-module-docs

@@ -0,0 +1,11 @@
+# -*- mode: snippet -*-
+# name: Elisp module docs
+# key: emd
+# --
+;;; `(-> (buffer-file-name) f-filename)` --- $2 -*- lexical-binding: t -*-
+;; Author: William Carroll <wpcarro@gmail.com>
+
+;;; Commentary:
+;; $3
+
+;;; Code: