Project code support (#336)

* Determine if project codes are supported

* Add helpers for boolean functions

* Adds helper methods for generic "model" class

- Will allow us to do some good refactoring

* Refactor the refactor

* Add debug support and getMap function

* Major refactoring for model data accessors

* Handle null values

* Add sentry reporting if key is used incorrectly

* Fix typo

* Refactor createFromJson function

* Add model for ProjectCode

* Display and edit project code for purchase orders

assets/release_notes.md

@@ -1,6 +1,7 @@
 ### 0.11.6 - April 2023
 ---
 
+- Add support for Project Codes
 - Fix action button colors
 - Added Norwegian translations
 - Fix serial number field when creating stock item