[SignInPage] Make rememberMe optional, add form slotProp

[bharatkashyap]

Breaking Change

• The "Remember Me" checkbox will not be included by default in the SignInPage component. If required,

import { SignInPage, Remember } from "@toolpad/core/SignInPage";
// ...
<SignInPage
   slots={{rememberMe: Remember}}
   // ...
  />

• Everything else remains the same, including passing props to this component via the rememberMe slot prop.

• Closes Provide an option for SignInPage to skip the stack with "Remember Me" and "Forgot Password" #4572

[mui-bot]

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https://deploy-preview-4574--mui-toolpad-docs.netlify.app/

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