make minimal picom config that just adds vsync

i3/.config/i3/config

@@ -13,7 +13,7 @@ set $just just --justfile ~/.config/i3/justfile
 new_window 1pixel
 
 exec --no-startup-id xset s off -dpms
-exec --no-startup-id picom --backend glx --vsync
+exec --no-startup-id picom
 exec --no-startup-id nm-applet
 exec --no-startup-id blueman-applet
 exec --no-startup-id $just reset-wallpaper

i3/.config/picom/picom.conf

@@ -0,0 +1,12 @@
+# Performance
+backend = "glx";
+vsync = true;
+use-damage = true;
+
+# Shadows & Corners
+shadow = false;
+corner-radius = 0; # Set to >0 for subtle rounded corners
+
+# Fading
+fading = false;
+shadow = false;