Add support for Positron

[jstrin]

svDiag currently detects Positron https://positron.posit.co/ as RStudio which then returns errors when calling rstudioapi::selectDirectory()

[phgrosjean]

@jsrin You are right. Positron behaves like it is RStudio and it fools the {rstudioapi} package. For instance, rstudioapi::selectFile() tries to run the corresponding RStudio function, but fails with "Function selectFile not found in RStudio". It is clear that all RStudio API is not converted (yet) into Positron.
So, I need to write code to detect this situation, since I cannot rely any more on {rstudioapi} broken functions.

[phgrosjean]

Version 1.1.2 does not issue errors any more in Positron. It still tries first to launch the native dialog box (assuming that Posit will progressively reimplement all the rstudioapi in Positron), and if it cannot, it silently falls back to the console (text) version of the prompt. I'll try to publish this version on CRAN, but for now, it fails on R devel due to errors in one of the dependencies (the yaml package).
In the meantime, you could do remotes::install_github("SciViews/svDialogs") to get a corrected version.

[jstrin]

Thank you @phgrosjean !