* refactor attachment code into its own file
* Add getters
* Remove custom models for each type of attachment
* Refactor existing widgets
* Fix double camera open bug
* Remove dead code
* Remove unused imports
* Refactor common code
* format
* Update release notes
* Add detail widget for SalesOrderShipment
* Support editing of shipment details
* Rearrange SalesOrderDetail page
* Add support for attachments against shipment model
* refactoring
* Add shipment details page
* Add user actions for shipments:
- Check / uncheck
- Take photo
* Placeholder action to send shipment
* Send shipment from app
* Display pending shipments on the home screen
* Improve rending for shipments list
* Add class definition for SalesOrderAllocation
* Display list of items allocated against SalesOrderShipment
* Bump release notse
* Click through to stock item
* Bump version number
* dart format
* cleanup
* Remove unused imports
