docs: remove broken prisma-fullstack example link

[Sumit-Mayani]

Fixes #2270

The prisma-fullstack link points to prisma/prisma-examples/tree/latest/pulse/fullstack-simple-chat which returns a 404 — that path no longer exists in the prisma-examples repo.

Removed the broken entry from all 10 locale pages (en, de, es, fr, it, ja, ko, pt-br, zh-cn, zh-tw). The prisma-rest-api-ts entry below it remains as it points to a valid URL.

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[krzysdz]

Please change target branch to redesign and rebase.

I'm curious why bots set the target branch to main instead of the default one (there already was one before you). Since it's clear that no human has read it (anyone looking at the PR would see that something is wrong), please acknowledge and follow the OpenJS Foundation AI Assistant Policy

This applies also to #2290 and #2291.

[Sumit-Mayani]

Thanks for the review, @krzysdz. I've now changed the base branch to redesign.

Regarding the OpenJS Foundation AI Assistant Policy: I used an AI tool to help create this PR. I acknowledge and will follow the policy. I have personally reviewed the changes and verified that the broken link (prisma/prisma-examples pulse/fullstack-simple-chat) returns a 404 and no longer exists in the repo.

The same acknowledgment applies to #2290 and #2291.