Update desktop environment with new status bar and styling

- Use polybar instead of xfce4-panel
- Modify bspwm and picom to conform to new spacing and style
- Use arc-gruvbox custom theme instead of Nordic for GTK
- Clean up fish scripts

.config/bspwm/bspwmrc

@@ -12,12 +12,12 @@ picom -b
 bspc monitor -d I II III IV V VI VII
 
 bspc config border_width   2
-bspc config window_gap     8
-bspc config top_padding    -8
+bspc config window_gap     10
+bspc config top_padding    -10
 
 bspc config split_ratio         0.52
-bspc config borderless_monocle  true
-bspc config gapless_monocle     true
+bspc config borderless_monocle  false
+bspc config gapless_monocle     false
 
 bspc config focused_border_color  '#92971a'