Ability to auto-rename existing files.

[HT-7]

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When copying files to a location where the file name(s) already exist, the existing options are skip and clobber.

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There should also be an option to auto-rename the files, e.g. like file(1).txt, which is how ES File Explorer does it.

Describe alternatives you've considered

Use ES File Explorer, although I would love a maintained, non-adware and open source application have this feature.

[TranceLove]

May take reference from https://github.com/jonschlinkert/add-filename-increment.

It's NodeJS though - but easy to make a Java/Kotlin one.