feat(bpm): 表单设计器 UserSelect/DeptSelect 支持默认选中当前用户/部门

1. UserSelect 新增 defaultCurrentUser 配置，默认选中当前登录用户
2. DeptSelect 新增 defaultCurrentDept 配置，默认选中当前用户所属部门
3. DeptSelect 改用 el-tree-select 实现树形层级显示
4. 支持单选/多选模式，预设值优先级高于默认值

src/plugins/formCreate/index.ts

@@ -68,6 +68,7 @@ import { UploadFile, UploadImg, UploadImgs } from '@/components/UploadFile'
 import { useApiSelect } from '@/components/FormCreate'
 import { Editor } from '@/components/Editor'
 import DictSelect from '@/components/FormCreate/src/components/DictSelect.vue'
+import DeptSelect from '@/components/FormCreate/src/components/DeptSelect.vue'
 
 const UserSelect = useApiSelect({
   name: 'UserSelect',
@@ -75,12 +76,6 @@ const UserSelect = useApiSelect({
   valueField: 'id',
   url: '/system/user/simple-list'
 })
-const DeptSelect = useApiSelect({
-  name: 'DeptSelect',
-  labelField: 'name',
-  valueField: 'id',
-  url: '/system/dept/simple-list'
-})
 const ApiSelect = useApiSelect({
   name: 'ApiSelect'
 })