Replacements for `@better-auth/cli`

`auth`

The Better Auth CLI is now published under the auth name, and @better-auth/cli is deprecated, so switch the dependency over.

json

{
  "devDependencies": {
    "@better-auth/cli": "1.4.21", 
    "auth": "1.7.3"
  }
}

bash

npx @better-auth/cli generate
npx auth generate