Commercial Vehicle / ActivitySim Model

[jpn--]

This PR contains the draft, in-progress commercial vehicle model infrastructure.

Component Checklist

• [x] initialize establishments table
• [x] accessibility
• [x] route generation
• [x] route purpose and vehicle type
• [x] route open jaw
• [ ] route terminal choice
• [ ] route start time choice
• [ ] stop generation
  • [ ] loop init
  • [ ] next stop purpose
  • [ ] next stop location
  • [ ] next stop dwell time
  • [ ] loop finalization