One production-backed plugin test host

One production-backed plugin test host复制锚点链接

Import createTestHost() from @pluxel/test. Services are explicit and default to an empty list; workbench: true adds the local test plane to the same host. Use start/stop/restart, typed batch starts, catalog transactions, dependency overrides, configuration and native resource disposal. The public Core and Services test factories are removed; Core graph harnesses remain internal.

Node/Worker source tests automatically attach the real artifact compiler when Node services are selected without an explicit artifact source. Each host owns its compiler, temporary cache and cleanup. Explicit packaged artifacts remain authoritative. The Vitest preset enables legacy decorators and keeps project plugins explicit; separately built Node artifacts do not inherit arbitrary Vitest plugins.

Official tests, generated plugin examples and testing documentation use the unified root entry.