refactor(lib): create lib/discord subfolder

Author: phorcys420

src/commands/util/close.ts

@@ -4,7 +4,7 @@ import {
   canMemberInteractWithThread,
   getChannelFromInteraction,
   isHelpPost,
-} from "@lib/channels.js";
+} from "@lib/discord/channels.js";
 
 import {
   type ThreadChannel,

src/commands/util/walkthrough.ts

@@ -1,6 +1,6 @@
 import { config } from "@lib/config.js";
 
-import { isHelpPost as isHelpThread } from "@lib/channels.js";
+import { isHelpPost as isHelpThread } from "@lib/discord/channels.js";
 import issueCategorySelector from "@components/issueCategorySelector.js";
 
 import {