please support syntax of float32_t/float64_t

Current status is like this:

![Image](https://github.com/user-attachments/assets/545c0a53-a20a-4057-a19d-425d0f7d81ae)

`float32_t`/`float64_t` is not supported. Would you please add this?

BTW, I have submitted an issue in the repo of `vim`, and they let me post my issue here. 
https://github.com/vim/vim/issues/16498