A resume mode based on file presence

[zlibto]

Hi,

Thank you for keep improving the open source Nextflow.

Resume works great. I wonder if there is interest in a new, less strict resume mode, that allows pipeline resume based on only file presence, similar to Makefile.

I think this nicely integrate with workflow outputs that nextflow look for presence of published output file by the output definition. The implementation can be something like using a subset of these resume conditions: https://docs.seqera.io/nextflow/cache-and-resume

This is helpful when working across multiple machines. E.g. Data is processed by pipeline 1 in an instance that terminated. Now I wanna tweak some downstream steps in pipeline 1 and re-run only them in my local machine. Another example is working with multiple pipelines.

Thank you!