!4 同步develop分支

* fix -- 修改获取流程节点信息接口（供前端渲染流程跟踪图着色使用）
* fix -- 修复流程跟踪着色问题
* fix -- 采用ProcessViewer组件显示流程跟踪信息
* fix -- 整合表单设计代码
* fix -- 简易实现用户任务选择用户下拉框内容
* fix -- 修改项目介绍及sql文件
* del -- 移除未使用的文件
* fix -- 修复组件无法显示和修改的问题
* add -- 整合 Rtony/RuoYi-flowable 工作流
* add -- 添加process-designer流程设计插件
* !3 同步ruoyi-vue-plus更新
* !2 登录认证用户信息添加nickName字段（流程任务需要使用到）

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