chore: rename rivetkit -> @rivetkit/core & expose @rivetkit/worker#1003

NathanFlurry wants to merge 1 commit into06-24-chore_docs_update_docs_structurerivet-dev/agent-os:06-24-chore_docs_update_docs_structurefrom

06-24-chore_rename_rivetkit_-_rivetkit_core_expose_rivetkit_workerrivet-dev/agent-os:06-24-chore_rename_rivetkit_-_rivetkit_core_expose_rivetkit_workerCopy head branch name to clipboard