Add default auth options to authPlugin

[Zeko369]

Closes: #3535

What are the changes and their implications?

Feature Checklist

• adds option to define authenticate or redirectAuthenticated on all pages by default and override them per page / layout

• [ ] Docs

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: f60f96f5d1412b6c810b1d5e94d8dda5b6ee5454

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 7 packages

Name	Type
@blitzjs/auth	Patch
blitz	Patch
@blitzjs/rpc	Patch
@blitzjs/next	Patch
@blitzjs/codemod	Patch
@blitzjs/config	Patch
@blitzjs/generator	Patch

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[beerose]

This is super cool! Thank you so much for this PR.

We should also cover it in the docs and possibly also add an example to one of the apps in the apps/ folder.

[Zeko369]

@beerose will do tomorrow