Purplship

What's new
- Enrich logs
- Collect and format Error fields

Breaking changes
- Replace `RateDetails` `expected_delivery` date by `transit_days` count

Breaking changes

- Rename carrier identifier keys for clarity
- renaming: carrier -> carrier_name
- renaming: carrier_name -> carrier_id

Documenting

- Add documentation for purplship SDK
- Fix build scripts
- Introduce datatypes to markdown generator scripts.

What is new

- Restructure the project as mono repo with micro-modules

Breaking Changes

- Uniform extension form for internal repo micromodules as well as third party bridges

What's new?

- Consolidate carrier service integration with purplship server integration and restful tests
- Many changes and improvements on the `Models`
- License Term updated to mention a commercial version availability

Major restructuring and API change

- Restructure project modules
- Introduce package separation between `Freight` and `Package`
- Introduce purplship.core wheel
- Complete improvement of `Models`
- Use the latest carriers datatypes packages