Move WebGPU to WebCore/features.json and add <model> element https://bugs.webkit.org/show_bug.cgi?id=238981 Reviewed by Myles C. Maxfield Source/JavaScriptCore: Move WebGPU stuff to the WebCore features.json file. features.json: Source/WebCore: This patch makes the following corrections: Moves the WebGPU Specification definition from JavaScriptCore/features.json to WebCore/features.json Removes t