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/.gvcci/themes/walle_4k/column.txt

@@ -0,0 +1,18 @@
+#05050b
+#cd91a8
+#14162f
+#ad6265
+#7e70ac
+#976982
+#407baf
+#a5667e
+#9e6b77
+#e9d1c8
+#232653
+#c5878a
+#9f93c6
+#b28ba1
+#6499c8
+#be899e
+#b98e98
+#fef5f1