docs: update example/config.lua with rule field descriptions

example/config.lua

@@ -33,9 +33,22 @@ input = {
 	accel_speed = 0.0,
 }
 
+-- Rules let you match windows by app_id, title, or class and apply window-manager
+-- settings.  Set `apply_effects = false` to disable compositor effects (shadows,
+-- transparency, rounded corners) on a matched window.
 rules = {
 	--   { app_id = "Gimp",                              floating = true,  monitor = -1 },
 	--   { app_id = "firefox", tags = 1 << 8,            floating = false, monitor = -1 },
+	--
+	--   -- `tags = "any"` places the window on whichever tag happens to be focused
+	--   -- `monitor = "default"` sends the window to the current / primary monitor
+	--   { app_id = "Alacritty", tags = "any",           monitor = "default" },
+	--
+	--   -- `can_float = false` locks the window into tiling (prevents togglefloating)
+	--   { app_id = "pavucontrol", floating = true,      can_float = false },
+	--
+	--   -- `title` matching works alongside or instead of app_id:
+	--   -- { title = "Save As",     floating = true,    apply_effects = false },
 }
 
 monitors = {