feat: bpmn设计器添加assignStartUserHandlerType适配Simple模式

src/components/bpmnProcessDesigner/package/penal/PropertiesPanel.vue

@@ -54,6 +54,10 @@
         <template #title><Icon icon="ep:promotion" />其他</template>
         <element-other-config :id="elementId" />
       </el-collapse-item>
+      <el-collapse-item name="customConfig" v-if="elementType.indexOf('Task') !== -1" key="customConfig">
+        <template #title><Icon icon="ep:circle-plus-filled" />自定义配置</template>
+        <element-custom-config :id="elementId" :type="elementType" />
+      </el-collapse-item>
     </el-collapse>
   </div>
 </template>