Feature Request: fastp operation on input and output directories

[SuhasSrinivasan]

Dear Authors,

Thank you for developing and maintaining fastp.

It would be very helpful if fastp can operate on FASTQ files in an input directory and place the filtered files in an output directory.

This would be especially helpful for paired-end FASTQ files and automatically matching the input file names by *R1.fastq.gz and *R2.fastq.gz would be great!

Thank you for your consideration.