Summary: a0.dev removes Google sign-in option

Why It Matters: This change might make it harder for new users to sign up quickly.

What Changed:

• The "Sign in with Google" button was removed.
• The example app idea changed from "Decision Maker Minimal Pomodoro Conversation Starter" to "Create a social media app where ... Minimal Pomodoro Decision Maker Mood Ring".
• The text "Twitter Discord Reddit" was removed from the very end of the page.