Refactoring our frontend API key: Familiar DX is the best DX

Clerk initially used a hostname as a frontend key for their SDK to optimize performance, which confused developers due to its unfamiliarity. Despite the performance benefits, this approach led to frequent developer misunderstandings, prompting Clerk to adopt a more conventional key format similar to those used by other companies like Stripe. By base64-encoding the original hostname key and adding a stop character, Clerk created a new publishable key that maintains performance while improving the developer experience. This change has resulted in smoother integration and setup for developers without sacrificing the efficiency of their authentication API.