fix(polyfill): complete window timer and EventTarget aliases

[LorenzGit]

Problem

canvas-polyfill only installed window.addEventListener when both global and window lacked it. NativeScript often already has global.addEventListener, so window.addEventListener stayed missing. window.setTimeout was set without clearTimeout. Games that call window.matchMedia, document.documentElement.dataset, or style.setProperty throw at module eval.

Change

Fill each missing alias independently. Preserve existing implementations. Add clearTimeout/clearInterval, a matchMedia stub, devicePixelRatio, document.hidden/visibilityState, HTMLElement.dataset, and CSSStyleDeclaration.setProperty.

Test plan

Four listener-ownership cases (none / global / window / both) plus matchMedia are in NEONLEAP native/tests/window-host.test.ts. They fail on unpatched a2c279b8 and pass with this diff.

Independent of the empty-measureText PR.

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[LorenzGit]

The red AudioContext jobs are not from this diff.

• iOS: NSCOpusDecoder.mm:7:10: fatal error: 'opusfile.h' file not found
• Android: CMake add_subdirectory for missing third_party/oboe

The last Canvas Native run on master (merge of #149, run 34359199107) failed the same AudioContext jobs (and Canvas iOS/Android). This PR does not touch packages/audio-context.

The relevant job for this change is Build Native / Canvas iOS + visionOS.