refactor(lombok): add Getter where possible

src/main/java/emu/grasscutter/game/CoopRequest.java

@@ -1,7 +1,9 @@
 package emu.grasscutter.game;
 
 import emu.grasscutter.game.player.Player;
+import lombok.Getter;
 
+@Getter
 public class CoopRequest {
     private final Player requester;
     private final long requestTime;
@@ -13,18 +15,6 @@ public class CoopRequest {
         this.expireTime = this.requestTime + 10000;
     }
 
-    public Player getRequester() {
-        return requester;
-    }
-
-    public long getRequestTime() {
-        return requestTime;
-    }
-
-    public long getExpireTime() {
-        return expireTime;
-    }
-
     public boolean isExpired() {
         return System.currentTimeMillis() > getExpireTime();
     }