Document orchestrator consumable API

[roncodes]

Summary

• Adds a Fleetbase API Orchestrator folder with run and commit requests.
• Documents route-aware VROOM, VROOM capacity-only, native capacity allocation, multi-phase prior assignments, and commit examples.
• Keeps request and response examples on public IDs only.

Validation

• npm run postman:lint passed.
• npm run postman:run:fleetbase is blocked locally because Postman CLI is not installed.