DEV: Update linting config and run gjs-codemod (#177)

javascripts/discourse/components/card/topic-replies-column.gjs

@@ -1,5 +1,5 @@
+import { gt } from "truth-helpers";
 import icon from "discourse/helpers/d-icon";
-import gt from "truth-helpers/helpers/gt";
 
 const TopicRepliesColumn = <template>
   {{#if (gt @topic.replyCount 1)}}

javascripts/discourse/components/sidebar-new-topic-button.gjs

@@ -5,9 +5,8 @@ import didInsert from "@ember/render-modifiers/modifiers/did-insert";
 import didUpdate from "@ember/render-modifiers/modifiers/did-update";
 import willDestroy from "@ember/render-modifiers/modifiers/will-destroy";
 import { service } from "@ember/service";
-import { gt } from "truth-helpers";
+import { gt, not } from "truth-helpers";
 import CreateTopicButton from "discourse/components/create-topic-button";
-import not from "truth-helpers/helpers/not";
 
 export default class SidebarNewTopicButton extends Component {
   @service composer;