fix(tao): give the GraalVM test image the classes it was compiled against

[kdroidFilter]

Summary

test-graalvm fails on all three platforms with NoClassDefFoundError: androidx/compose/material3/MaterialThemeKt, thrown on the Tao main thread, which closes the event loop and takes the whole job down. examples/tao-native-test compiles decorated-window-tao's test suites into a native image, but taoTestArtifacts published only the compiled classes — every dependency of that test source set had to be repeated in the consumer, and Material 3 was not. The configuration now extends testImplementation, so a dependency added to the suites reaches the image without being repeated.

Reproduced and verified on the JVM (:examples:tao-native-test:run --args=headful), which shares that classpath — two minutes instead of a 24-minute native build.

With the film cases finally reaching their own code, three things they had never been green on:

• Zero-height content. They compose into a ColumnScope next to the harness's default fillMaxSize background, so the forty rows of text that exist to make the owner's per-frame present cost something rendered nowhere. paintDefaultBackground = false.
• The grabber started before the warm-up and spent its whole frame budget on it, leaving the curve with nothing after the timestamp it measures from — reported as "the dialog never showed up on screen".
• One capture session covered both halves, so the appearance consumed the budget and the disappearance got no frames, which is what the two matches the in-scene layer cases were failing on. Each half films in its own session now, within the same total budget.

Test plan

• :examples:tao-native-test:run --args=headful — the NoClassDefFoundError is gone and the suite runs past the Material 3 cases
• taoHeadfulTest -Dnucleus.tao.headful.filter=appearance under Xvfb + openbox: 6 failures → 0, two consecutive runs
• :decorated-window-tao:test, ktlintCheck, detekt, apiCheck; :examples:tao-native-test:compileKotlin
• test-graalvm on all three platforms in CI

Known, not addressed here

graphicsLayer translation filmed — native popup layer hangs on Linux, which is what makes that leg reach the 900 s watchdog. It draws a GraphicsLayer created from the owner window's GraphicsContext inside the popup's own GL context, with alpha forcing the saveLayer path; the in-scene variant of the same case passes. Pre-existing, and its own investigation.

The native popup layer matches the in-scene layer comparison is borderline under Xvfb (slide-in measured 15 px vs 10 px against a 4 px tolerance) — a 6 ms sample period is coarse for a 10 dp slide. Tolerances left as calibrated.