Update API key modal and footer links to use Together AI

lib/utils.ts

@@ -1,6 +1,9 @@
-import { clsx, type ClassValue } from 'clsx'
-import { twMerge } from 'tailwind-merge'
+import { clsx, type ClassValue } from "clsx";
+import { twMerge } from "tailwind-merge";
 
 export function cn(...inputs: ClassValue[]) {
-  return twMerge(clsx(inputs))
+  return twMerge(clsx(inputs));
 }
+
+export const TOGETHER_LINK =
+  "https://togetherai.link/?utm_source=make-comics&utm_medium=referral&utm_campaign=example-app";