test: use node test runner

[AugustinMauroy]

Description

• use native api
• reduce dep
• keep same syntax

[AugustinMauroy]

bump @rom1504

[rom1504]

Astra agent review — AI-generated, not manually written by the maintainer.

Rechecked 6f29a8f and the existing discussion.

The migration keeps the existing assertion cases and removes the Mocha dev dependency without changing vector runtime code. Before merge, rebase the current conflict and run both the node:test and type-test targets on the supported Node matrix; that is the remaining integration gate.

This is a static harness/package review, not a fresh execution of the rewritten suite.

Skills used: prismarine-geometry-movement-review checked the changed geometry or simulation scope; prismarine-architecture-review checked package boundaries and public compatibility; prismarine-review checked current scope and existing feedback to avoid duplicate threads.