Support !important for patchStyle.

Editor assessment

The subject states the capability and its mechanism exactly — !important is supported for patchStyle — so the header communicates the feature and the style API it extends without the diff, and feat(runtime-dom) classifies and locates it correctly. The one flaw is the trailing period, a small hygiene blemish the CC style avoids, and the leading exclamation in !important sits unusually close to breaking-marker territory without causing ambiguity here. No body is needed for a contained style feature, and no footer is required. Clear and accurate despite the blemish: a good example.