feat: getLatestChatMessage eval function

src/main/java/me/chayapak1/chomens_bot/evalFunctions/GetLatestChatMessageFunction.java

@@ -0,0 +1,33 @@
+package me.chayapak1.chomens_bot.evalFunctions;
+
+import me.chayapak1.chomens_bot.Bot;
+import me.chayapak1.chomens_bot.data.eval.EvalFunction;
+import me.chayapak1.chomens_bot.plugins.ChatPlugin;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.serializer.gson.GsonComponentSerializer;
+
+public class GetLatestChatMessageFunction extends EvalFunction {
+    private String latestMessage = "";
+
+    public GetLatestChatMessageFunction (Bot bot) {
+        super("getLatestChatMessage", bot);
+
+        bot.chat.addListener(new ChatPlugin.Listener() {
+            @Override
+            public boolean systemMessageReceived(Component component, String string, String ansi) {
+                messageReceived(component);
+
+                return true;
+            }
+        });
+    }
+
+    private void messageReceived (Component component) {
+        latestMessage = GsonComponentSerializer.gson().serialize(component);
+    }
+
+    @Override
+    public Output execute(Object... args) {
+        return new Output(latestMessage, true);
+    }
+}