Add news reader (#3445)

* add model for feed entries

* add task to update feed entries

* Add API routes

* Fix name in model

* rename model

* fix read endpoint

* reduce duplication in NewsFeed API endpoints

* reduce duplicated code

* add ui elements to index

* add missing migrations

* add ressource route

* add new model to admin

* reorder fields

* format timestamp

* make title linked

* reduce migrations to 1

* fix merge

* fix js style

* add model to ruleset

InvenTree/users/models.py

@@ -76,6 +76,7 @@ class RuleSet(models.Model):
             'plugin_pluginconfig',
             'plugin_pluginsetting',
             'plugin_notificationusersetting',
+            'common_newsfeedentry',
         ],
         'part_category': [
             'part_partcategory',