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/text-mode/.yas-parents

@@ -0,0 +1 @@
+text-mode

configs/shared/.emacs.d/snippets/text-mode/check-mark

@@ -0,0 +1,5 @@
+# -*- mode: snippet -*-
+# name: Unicode checkmark
+# key: uck
+# --
+✓

configs/shared/.emacs.d/snippets/text-mode/x-mark

@@ -0,0 +1,5 @@
+# -*- mode: snippet -*-
+# name: Unicode ex-mark
+# key: ux
+# --
+✗