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/.emacs.d/snippets/c-mode/struct

@@ -1,7 +0,0 @@
-# -*- mode: snippet -*-
-# name: struct
-# key: struct
-# --
-typedef struct $1 {
-  $2
-} $1_t;