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/picom/picom.conf

@@ -7,8 +7,6 @@ shadow-radius = 14
 fading = true
 fade-delta = 5
 
-inactive-opacity = 0.85
-
 blur-background = true
 blur-kern = "11x11gaussian"
 
@@ -17,4 +15,5 @@ vsync = true
 wintypes:
 {
   dock = { shadow = false; };
+  utility = { shadow = false; };
 };