helper function to filter a set of Mplus input files based on whether the corresponding .out file already exists
filter_inp_filelist(inp_files, replaceOutfile = "always", quiet = TRUE)a vector of input file locations to check for corresponding .out files
optional. Currently supports three settings: “always”, which runs all models, regardless of whether an output file for the model exists; “never”, which does not run any model that has an existing output file; and “modifiedDate”, which only runs a model if the modified date for the input file is more recent than the output file modified date (implying there have been updates to the model).
whether to print out text indicating what files were skipped