refactor(api): 重新设计API结构

platforms/bukkit/src/main/java/cc/carm/plugin/minesql/MineSQLBukkit.java

@@ -57,7 +57,7 @@ public class MineSQLBukkit extends EasyPlugin implements MineSQLPlatform {
     @Override
     protected void shutdown() {
         log("终止全部数据库连接...");
-        this.core.getRegistry().shutdownAll();
+        this.core.shutdownAll();
     }
 
     @Override

platforms/bungee/src/main/java/cc/carm/plugin/minesql/MineSQLBungee.java

@@ -66,7 +66,7 @@ public class MineSQLBungee extends Plugin implements MineSQLPlatform {
     public void onDisable() {
         outputInfo();
         getLogger().info("终止全部数据库连接...");
-        this.core.getRegistry().shutdownAll();
+        this.core.shutdownAll();
     }
 
     public static MineSQLBungee getInstance() {

platforms/velocity/src/main/java/cc/carm/plugin/minesql/MineSQLVelocity.java

@@ -86,7 +86,7 @@ public class MineSQLVelocity implements MineSQLPlatform {
     public void onShutdown(ProxyShutdownEvent event) {
         outputInfo();
         getLogger().info("终止全部数据库连接...");
-        this.core.getRegistry().shutdownAll();
+        this.core.shutdownAll();
     }
 
     public ProxyServer getServer() {