RegVar annotation files

Required annotation files for RegVar; must be in correct directory according to github, https://github.com/RomoL2/RegVar (for example, located in: /Library/Frameworks/R.framework/Versions/4.0/Resources/library//RegVar/inst/extdata).RegVar所需的标注文件，需按照其GitHub仓库（https://github.com/RomoL2/RegVar）中的要求放置至正确目录，示例存放路径为：/Library/Frameworks/R.framework/Versions/4.0/Resources/library/RegVar/inst/extdata。