Account Setup for local dev so complicated, its an adoption blocker

Setting up an amplify account for local dev is a labyrinth. It is so complicated that it blocks the adoption of new users to the platform. https://docs.amplify.aws/react/start/account-setup/

There should be a turn key, single button press way to set up local dev.

It should

1. create a non-root iam user
2. assign correct permissions to it.
3. do everything else required so that setup does not require 17 steps.

I spend days setting this up. I go away from amplify, come back 6 months later, forget how to do all this, then spend another day setting this up instead of coding.

This is a HUGE deal.

首先阅读链接的账户设置文档 docs.amplify.aws/react/start/account-setup/，并将其当前的17步流程映射到所请求的本地开发流程。只有在定义明确的 turnkey 路径能够创建非 root IAM 用户、分配正确的权限并处理剩余的设置要求时，该 issue 才算完成。

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