port: replace Paper component APIs, chat pipeline, events and schedulers

- Msg.send/broadcast/actionBar/title/legacy/plain for all 58 files sendMessage replacements (plan step 3)
- ChatEventListener: AsyncChatEvent->AsyncPlayerChatEvent, getRecipients filtering, manual render+Msg.send loop, HIGHEST|ignoreCancelled, nobodyHeard via Bukkit scheduler (step 4)
- EnhancedChatRenderer: remove ChatRenderer/Audience, render(Player,Component,Component,Player), getLocale String, Msg.actionBar
- PlayerEventListener: join/quit/death String API, getCustomName/getDisplayName legacy, Msg.broadcast
- FoliaUtil: IS_FOLIA false, Bukkit scheduler only; AutoMessageManager BukkitTask
- CustomCommandManager: reflective getCommandMap; other mechanical fixes (displayName, kick, inventory titles)
- single universal jar (variant A) - loads on Spigot 1.20.1 and Paper

src/main/java/com/loki/lochat/gradient/config/GradientMessages.java

@@ -1,5 +1,7 @@
 package com.loki.lochat.gradient.config;
 
+import com.loki.lochat.compat.Msg;
+
 import com.loki.lochat.utils.format.ChatFormatter;
 
 import net.kyori.adventure.text.Component;
@@ -86,13 +88,13 @@ public class GradientMessages {
      * Отправляет сообщение игроку
      */
     public void send(CommandSender sender, String key) {
-        sender.sendMessage(getComponent(key));
+        Msg.send(sender, getComponent(key));
     }
 
     /**
      * Отправляет сообщение игроку с заменами
      */
     public void send(CommandSender sender, String key, String... replacements) {
-        sender.sendMessage(getComponent(key, replacements));
+        Msg.send(sender, getComponent(key, replacements));
     }
 }