Part parameters (#224)

* Adds class representing the PartParameter model

* Adds API method for determining support for PartParmaters

* Display part parameter count in part detail widget

* Adds user setting for controlling if part parameters are displayed

* Fix URL for model

* Widget for displaying part parameters

* linting

lib/l10n/app_en.arb

@@ -579,6 +579,12 @@
   "packageName": "Package Name",
   "@packageName": {},
 
+  "parameters": "Parameters",
+  "@parameters": {},
+
+  "parametersSettingDetail": "Display part parameters",
+  "@parametersSettingDetail": {},
+
   "parent": "Parent",
   "@parent": {},