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/lego_manhattan/columns-with-headers.txt

@@ -0,0 +1,25 @@
+Background
+#d5c699
+
+Foreground
+#400000
+
+Normal ANSI Colors
+#483e1e
+#7f3508
+#144a32
+#7e6a09
+#167584
+#5a400e
+#1f7778
+#bdf4ee
+
+Bright ANSI Colors
+#6d5d2c
+#b84d0b
+#207b53
+#b79a0d
+#1ea3b9
+#8f6516
+#2ba7a8
+#f2fdfc