chore: update c, example files

config/config.example

@@ -18,8 +18,8 @@ focus_mode = click
 decorations = true
 
 [appearance]
-# Border width in pixels (default: 2)
-border_width = 2
+# Border width in pixels (default: 0)
+border_width = 0
 
 # Title bar height in pixels (default: 24)
 title_height = 24
@@ -27,8 +27,8 @@ title_height = 24
 # Panel height in pixels (default: 28)
 panel_height = 28
 
-# Gap between windows in pixels (default: 4)
-gap = 4
+# Gap between windows in pixels (default: 0)
+gap = 0
 
 # Font for titles and panels (default: fixed)
 # Use xlsfonts to list available fonts