Parameters refactor (#738)

* 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

* Add check for modern parameter API

* Add generic parameter type

* Remove old code

* Remove dead code

* Refactor previous widget

* Remove unused imports

* Refactor common code

* format

* Update release notes

* Helper func to render parameters list tile

* Display parameters on part page

* parameters for company

* Supplier more model types:

- ManufacturerPart
- SupplierPart
- PurchaseOrder
- SalesOrder

* dart format

* Fix image prefix

* Remove unused import

* Adjust API version

lib/api.dart

@@ -353,6 +353,10 @@ class InvenTreeAPI {
   // Supports separate search against "supplier" / "customer" / "manufacturer"
   bool get supportsSplitCompanySearch => apiVersion >= 315;
 
+  // Does the server support the "modern" (consolidated) parameter API?
+  // Ref: https://github.com/inventree/InvenTree/pull/10699
+  bool get supportsModernParameters => apiVersion >= 429;
+
   // Cached list of plugins (refreshed when we connect to the server)
   List<InvenTreePlugin> _plugins = [];