refactor: align commands and interaction handler with project style

- Replace forwardToOwner embed approach with getComponentsForNaomi + Components V2
- Extract InteractionCreate handler to src/events/handleInteractionCreate.ts
- Replace deployGlobal.ts script with static commands.json payload
- Fix minor error handling in createTask and onboardMentee

src/commands/createTask.ts

@@ -43,7 +43,7 @@ const generateTaskDescription = async(
     system: taskSystemPrompt,
   });
   const [ firstContent ] = aiResponse.content;
-  return firstContent.type === "text"
+  return firstContent?.type === "text"
     ? firstContent.text
     : description;
 };