improve server side command line input (#415)

* improve server side command line input

* prevent multiline logs from covering typed commands

* reduce text in console

* resolve conflicts caused by multilanguage

Co-authored-by: Magix <kobedo11@gmail.com>

src/main/java/emu/grasscutter/utils/JlineLogbackAppender.java

@@ -0,0 +1,20 @@
+package emu.grasscutter.utils;
+
+import ch.qos.logback.classic.spi.ILoggingEvent;
+import ch.qos.logback.core.ConsoleAppender;
+import emu.grasscutter.Grasscutter;
+import org.jline.reader.LineReader;
+
+import java.util.Arrays;
+
+public class JlineLogbackAppender extends ConsoleAppender<ILoggingEvent> {
+    @Override
+    protected void append(ILoggingEvent eventObject) {
+        if (!started) {
+            return;
+        }
+        Arrays.stream(
+                new String(encoder.encode(eventObject)).split("\n")
+        ).forEach(Grasscutter.getConsole()::printAbove);
+    }
+}