UI console (#4631)

* adding columnify and ember-cli-cjs-transform

* add yargs-parser

* remove vendored yargs-parser tokenizer and use cjs transform to import it from actual yargs-parser

* add clear command that clears the log, but maintains history

* make codemirror have no gutter and be auto-height when rendered in the console output log

* add fullscreen command and hook up fullscreen toggle button

* hook up copy button

ui/tests/integration/components/console/log-text-test.js

@@ -0,0 +1,17 @@
+import { moduleForComponent, test } from 'ember-qunit';
+import hbs from 'htmlbars-inline-precompile';
+
+moduleForComponent('console/log-text', 'Integration | Component | console/log text', {
+  integration: true,
+});
+
+test('it renders', function(assert) {
+  // Set any properties with this.set('myProperty', 'value');
+  // Handle any actions with this.on('myAction', function(val) { ... });
+  const text = 'Success! You did a thing!';
+  this.set('content', text);
+
+  this.render(hbs`{{console/log-text content=content}}`);
+
+  assert.dom('pre').includesText(text);
+});