waybar: add network widget, margins, border and rounded corners

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

config/waybar/style.css

@@ -1,6 +1,6 @@
 * {
   font-family: JetBrainsMono Nerd Font;
-  font-size: 13px;
+  font-size: 18px;
   border: none;
   border-radius: 0;
   min-height: 0;
@@ -9,6 +9,8 @@
 window#waybar {
   background: #0a0a0a;
   color: #f3eeea;
+  border: 1px solid #560500;
+  border-radius: 8px;
 }
 
 #custom-nurgle {
@@ -39,6 +41,11 @@ window#waybar {
   color: #f3eeea;
 }
 
+#custom-network {
+  color: #f3eeea;
+  padding: 0 8px;
+}
+
 #cpu {
   color: #f3eeea;
   padding: 0 8px;