fix: rewrite bunx prisma to rtk prisma

[alexanderkreidich]

Summary

• add bunx prisma to the Prisma rewrite rule in the registry
• cover the new prefix in the Rust classify/rewrite tests
• add a Claude hook regression case for bunx prisma migrate

Testing

• /Users/sasha/.rustup/toolchains/stable-x86_64-apple-darwin/bin/cargo test prisma -- --nocapture
• printf ... | PATH=target/debug:$PATH bash hooks/claude/rtk-rewrite.sh | jq -r .hookSpecificOutput.updatedInput.command → rtk prisma migrate

Closes #1401

[CLAassistant]

All committers have signed the CLA.

[KuSh]

Hi @alexanderkreidich, thanks for your PR, there's already #1374 which is a more complete proposal.

[alexanderkreidich]

Closing this as superseded by #1374, which covers Bun/bunx support more comprehensively. Thanks for pointing me there — happy to follow up there if any small gaps remain.