feat(runtime-vapor): add defineComponent

packages/runtime-vapor/src/apiDefineComponent.ts

@@ -0,0 +1,5 @@
+// TODO
+/*! #__NO_SIDE_EFFECTS__ */
+export function defineComponent(comp: any) {
+  return comp
+}

packages/runtime-vapor/src/index.ts

@@ -50,6 +50,7 @@ export * from './dom'
 export * from './apiLifecycle'
 export * from './if'
 export * from './for'
+export { defineComponent } from './apiDefineComponent'
 
 export * from './directives/vShow'
 export * from './directives/vModel'