Feature: Added file operation support for FTP

[NicoooByte]

Resolved / Related Issues

• Were these changes approved in an issue or discussion with the project maintainers? In order to prevent extra work, feature requests and changes to the codebase must be approved before the pull request will be reviewed. This prevents extra work for the contributors and maintainers.
  Closes partially Feature: Improving FTP support #5833 (Move operation)

Adds feature of moving files and folders in an FTP storage via the FluentFTP library.

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[gave92]

Hi, thanks for your contribution!

Please see https://github.com/NicoooByte/Files/pull/1/files for some suggested changes:

• Restored some of the previous code, needed for operations outside FTP folders
• Renamed MoveFolderAsync to MoveAsync, to match RenameAsync, etc..
• Made so the method returns the moved folder

Other than that this is looking good.

[yaira2]

@NicoooByte thank you for your contribution, and congrats on your first pull request!

[NicoooByte]

Thanks, feels good :)

[yaira2]

You happened to have picked one of the more difficult issues, it's a good thing Gave was able to help with the review.