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/construction_paper_iceberg_4k/column.txt

@@ -0,0 +1,18 @@
+#dad0df
+#0c024d
+#37293d
+#767676
+#1133fa
+#92669b
+#5328e6
+#c00bfb
+#8702f8
+#e7bcf6
+#523e5b
+#969393
+#4a65fe
+#ad89b5
+#7d5cef
+#d145ff
+#a339ff
+#faf1fd