feat: implement playersSleepingPercentage gamerule support

- Calculate required sleeping players based on configured percentage
- Use game_rules.players_sleeping_percentage from level info
- Ceil the result to ensure minimum required players
- Return false early if no players online

pumpkin/src/world/mod.rs

@@ -2107,8 +2107,19 @@ impl World {
             .count();
         drop(players);
 
-        // TODO: sleep ratio
-        sleeping_player_count == player_count && player_count != 0
+        if player_count == 0 {
+            return false;
+        }
+
+        let sleep_percentage = self
+            .level_info
+            .load()
+            .game_rules
+            .players_sleeping_percentage;
+        let required_sleeping =
+            ((player_count as f64 * sleep_percentage as f64) / 100.0).ceil() as usize;
+
+        sleeping_player_count >= required_sleeping
     }
 
     // NOTE: This function doesn't actually await on anything, it just spawns two tokio tasks