New session management system

[kshen3778]

Instead of generating a new session ID, we use file paths to specify where data should be saved and loaded. See photo of how it should work:

Only the data from input_upload step is centralized for all runs because its only needed once. The input upload step will take the filepath /project as input. The filepaths to be entered for each step afterwards is /project/runID/

Eventually, after entering in a file path, relevant input data could be autoimported/uploaded instead of the user having to manually upload.

[kshen3778]

Made changest to allow for custom session id names instead of default generated uuid