Feature request: consistant action as in RMarkdown

[Hocnonsense]

In RStudio, code block marked with '```\{r.+?\}' can be recognized as runable block, but in vscode grammer, only '```\{\.r' can be recognized as R format. (This feature was first added to support Codebraid format at

vscode-markdown-tm-grammar/build.js

Line 16 in e073142

{ name: 'r', language: 'r', identifiers: ['R', 'r', 's', 'S', 'Rprofile', '\{\.r.+?(\})'], source: 'source.r' },

)

Is it possible to also add support to RMarkdown-stype code block?

Thanks!