refactor: 提供provider注册的装饰方法

typescript/core/decorator/decorator.ts

@@ -9,6 +9,15 @@ export function shortcut() {
     };
 }
 
+/**
+ * 注册provider
+ */
+export function provider() {
+    return function decorator<U>(Target: Constructor<U> & {xtype: string}): void {
+        BI.provider(Target.xtype, Target);
+    };
+}
+
 /**
  * 注册model
  */