fix(publish): move packages off the unowned @agentos npm scope

[NathanFlurry]

We do not own the bare @Agentos npm org, so no package may use it. Rename
the two @agentos/* packages to @rivet-dev/agentos-:
@agentos/test-harness -> @rivet-dev/agentos-test-harness
@agentos/website -> @rivet-dev/agentos-website
This also fixes preview/release publishing: the version bumper resolves any
workspace dep outside @rivet-dev/agentos- (and not in the publish set)
against npm latest, which 404s for the unpublished @agentos/test-harness and
fails the publish. Update the CI --filter guards and document the scope
convention in CLAUDE.md.

[NathanFlurry]

Stack for rivet-dev/agentos

• fix(publish): move packages off the unowned @agentos npm scope #1668 tukzktrz · 2026-07-08 08:17:56 👈
• fix(vfs): expose positioned writes in test kernel #1667 klrzzkro · 2026-07-08 07:11:50
• fix(runtime): unblock WasmVM signal waits and dispose #1666 zkywnwup · 2026-07-08 07:11:48
• test(registry): mark stdin redirection parity proven #1665 lonnzuqw · 2026-07-08 07:11:47
• fix(runtime): honor >> append mode in guest shell VFS redirection #1664 ouxrzutq · 2026-07-08 07:11:46
• chore(registry): remove vix package; document real-tool (no-reimplementation) principle #1663 wuzulpzz · 2026-07-08 07:11:44
• refactor(software): flatten registry/ into top-level software/ and toolchain/ #1662 wktwwvso · 2026-07-08 07:11:42
• refactor(tests): relocate runtime integration tests into packages/runtime-core; add test-standardization spec #1661 rwowokzx · 2026-07-08 07:11:41
• main

Get stack: forklift get 1668
Push local edits: forklift submit
Merge when ready: forklift merge 1668