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/org-mode/code-snippet

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name: Code Snippet
+# key: src
+# --
+#+BEGIN_SRC $1
+$2
+#+END_SRC