Internal function to print to vsc

Sends text to vsc, together with source information

printToVsc(ret, skipCalls = 0, category = "stdout", showSource = TRUE)

Arguments

ret	The text to be sent
skipCalls	The number of calls to skip when reporting the calling file and line. Can be used e.g. inside log functions.
category	The output category ("stdout", "stderr", ...)
showSource	Whether to show the calling source file and line.