test: resolve IFC WASM with hoisted dependencies

[Aymericr]

The imported-mesh conversion tests fail when this repo is consumed as a submodule with dependencies hoisted to the parent: the hard-coded editor/node_modules/web-ifc directory does not exist. Resolve the WASM directory from the installed web-ifc module, matching the neighboring beam and opening tests.

Validation: 8 imported-mesh conversion tests passed (6,077 assertions) against parent-hoisted dependencies; Biome and diff checks passed. Test setup only; converter behavior is unchanged.

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Note

Low Risk
Test-only path resolution change; no production or converter logic is modified.

Overview
Updates imported-mesh conversion tests so wasmPath is derived from the installed web-ifc package via import.meta.resolve, instead of a fixed ../../../node_modules/web-ifc/ path.

This lets the suite run when dependencies are hoisted to a parent repo (e.g. submodule consumption), consistent with the beam and opening IFC tests. Converter behavior is unchanged—only test fixture wiring.

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[pascal]

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Error id: e178446b-e80d-40ca-a105-e5db86dff022