launcher.explorer: please support using forward slash to specify file path

[zhizhongpu]

Is your feature request related to a problem? Please describe.

Now flow launcher does not recognize forward slash paths like "source/analysis/data_validation/" - it only recognizes backslash paths like "source\analysis\data_validation"

Describe the solution you'd like

recognize forward slash paths like "source/analysis/data_validation/"

Describe alternatives you've considered

Settings does not seem to have an option to allow forward slash

Additional context

[github-actions]

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