Move files around, formatter helper

Formatters for username belong to account, not to note
New helper for transforming a markdown text to html

frontend-reactive/tests/integration/helpers/tokenise-content-test.ts

@@ -0,0 +1,17 @@
+import { module, test } from 'qunit'
+import { setupRenderingTest } from 'frontend-reactive/tests/helpers'
+import { render } from '@ember/test-helpers'
+import { hbs } from 'ember-cli-htmlbars'
+
+module('Integration | Helper | tokeniseContent', function (hooks) {
+  setupRenderingTest(hooks)
+
+  // TODO: Replace this with your real tests.
+  test('it renders', async function (assert) {
+    this.set('inputValue', '1234')
+
+    await render(hbs`{{formatter this.inputValue}}`)
+
+    assert.dom().hasText('1234')
+  })
+})