split physio signals into runs with a GUI

[mixue-t]

added functions to split physio signals into runs using peakdet GUI peakdet is yet to be imported in slice4phys

Closes #

Proposed Changes

Change Type

• [ ] bugfix (+0.0.1)
• [ ] minor (+0.1.0)
• [ ] major (+1.0.0)
• [ ] refactoring (no version update)
• [ ] test (no version update)
• [ ] infrastructure (no version update)
• [ ] documentation (no version update)
• [ ] other

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