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/misc/.config/compton.conf

@@ -1,24 +0,0 @@
-# shadow
-shadow = true;
-shadow-radius = 7;
-shadow-offset-x = -7;
-shadow-offset-y = -7;
-
-# opacity
-menu-opacity = 0.8;
-inactive-opacity = 0.8;
-
-# transitions
-fading = true;
-fade-in-step = 0.07;
-fade-out-step = 0.07;
-
-# lock screen
-# NOTE: Need this rule here because I set XSECURELOCK_NO_COMPOSITE=1 in
-# ~/.profile. Without this, the lock screen will adopt the opacity settings
-# above, which is a security risk if you lock your screen while it has sensitive
-# content on it.
-#
-# NOTE: For some reason, `100:class_g` doesn't work, so settling for
-# `99:class_g` instead.
-opacity-rule = [ "99:class_g = 'xsecurelock'" ];