Dashboard 1.0 Migration Scripts

### Description

Thought: could we provide a form/service where users upload their Dashboard 1.0 `flow.json`, and in return we provide an auto-parsed `flow.json` which is our best attempt at re-producing that flow for Dashboard 2.0.

In _most_ cases, variables are the same, and we need to write a detailed migration guide (#212) anyway, so this could be a very powerful accompanying value.

For users/companies with extensive Dashboard 1.0 flows, this could be a golden nugget in persuading them to convert over.

### Have you provided an initial effort estimate for this issue?

I have provided an initial effort estimate