refactor(lombok): add Getter where possible

src/main/java/emu/grasscutter/utils/objects/ServerLogEventAppender.java

@@ -4,8 +4,11 @@ import ch.qos.logback.classic.spi.ILoggingEvent;
 import ch.qos.logback.core.AppenderBase;
 import ch.qos.logback.core.encoder.Encoder;
 import emu.grasscutter.server.event.internal.ServerLogEvent;
+import lombok.Getter;
+
 import java.nio.charset.StandardCharsets;
 
+@Getter
 public final class ServerLogEventAppender<E> extends AppenderBase<E> {
     private Encoder<E> encoder;
 
@@ -17,10 +20,6 @@ public final class ServerLogEventAppender<E> extends AppenderBase<E> {
         sle.call();
     }
 
-    public Encoder<E> getEncoder() {
-        return this.encoder;
-    }
-
     public void setEncoder(Encoder<E> encoder) {
         this.encoder = encoder;
     }