refactor: 💡 pull up loading and route action helper to core

addons/core/README.md

@@ -28,17 +28,13 @@ Add this addon to an Ember application's `devDependencies` as:
 
 See monorepo README for installation instructions.
 
-To use internationalization features, install `ember-intl` into your project:
-`ember install ember-intl`.
-
 ## I18n
 
 To access translations within a template, see `ember-intl` docs.
 
 ## Notifications
 
-To use in-app notifications, first install `ember-notify` in your app.  Then use
-the notificaiton decorators to notify the user when a function or action
+Use notificaiton decorators to notify the user when a function or action
 succeeds or fails.  For example:
 
 ```js
@@ -100,7 +96,17 @@ Ember config (see admin).  Then reference doc links by keys:
 
 ## Loading Helper
 
-To make use of the `is-loading` helper, install `ember-loading` first.
+See admin and desktop routes and templates for examples of how to
+use the loading subsystem.  For example, to annotate that an async action should
+present a loading indicator to a user:
+
+```js
+@action
+@loading
+async myAction() {
+  // ...do potentially time-consuming task
+}
+```
 
 ## Yarn Commands
 

addons/core/package.json

@@ -32,7 +32,9 @@
     "ember-cli-htmlbars": "^5.2.0",
     "ember-intl": "^5.5.0",
     "ember-notify": "^6.0.0",
-    "ember-page-title": "^6.0.3"
+    "ember-page-title": "^6.0.3",
+    "ember-loading": "^0.4.0",
+    "ember-route-action-helper": "^2.0.8"
   },
   "devDependencies": {
     "@ember/optional-features": "^1.3.0",

ui/admin/package.json

@@ -61,12 +61,10 @@
     "ember-export-application-global": "^2.0.1",
     "ember-inline-svg": "^1.0.0",
     "ember-load-initializers": "^2.1.1",
-    "ember-loading": "^0.4.0",
     "ember-maybe-import-regenerator": "^0.1.6",
     "ember-modifier": "^2.1.1",
     "ember-qunit": "^4.6.0",
     "ember-resolver": "^8.0.0",
-    "ember-route-action-helper": "^2.0.8",
     "ember-source": "~3.20.2",
     "ember-template-lint": "^2.14.0",
     "eslint": "^7.5.0",

ui/desktop/package.json

@@ -56,12 +56,10 @@
     "ember-export-application-global": "^2.0.1",
     "ember-inline-svg": "^1.0.0",
     "ember-load-initializers": "^2.1.1",
-    "ember-loading": "^0.4.0",
     "ember-maybe-import-regenerator": "^0.1.6",
     "ember-modifier": "^2.1.1",
     "ember-qunit": "^4.6.0",
     "ember-resolver": "^8.0.0",
-    "ember-route-action-helper": "^2.0.8",
     "ember-source": "~3.20.2",
     "ember-template-lint": "^2.14.0",
     "eslint": "^7.5.0",