fix: filter newline

[valoq]

we are using newline as a delimiter, so we cant have this in filenames

[CatsDeservePets]

Please also filter these out before writing marks and tags.

[valoq]

Please also filter these out before writing marks and tags.

Thanks for catching that.
I went through it again and found a bunch of other functions that have the same issue.

I was contemplating this for a while, but I also added an error log instead of just skipping the file, so at least its in the logs. Ui error display did not seem appropriate for these functiosn though.
In case of listFilesInCurrDir the err log is skipped because that would trigger by just visiting a directory, but maybe we should it there too?

I would like some feedback on the approach for now.