@PostMapping("")
    public ShenyuAdminResult createTag(@Valid @RequestBody final TagDTO tagDTO) {
        Integer createCount = tagService.create(tagDTO);
        return ShenyuAdminResult.success(ShenyuResultMessage.CREATE_SUCCESS, createCount);
    }
create tag.

@param tagDTO tagDTO.
@return {@linkplain ShenyuAdminResult}
shenyu-admin/src/main/java/org/apache/shenyu/admin/controller/TagController.java