feat(validator): Introduce `responseValidator` #6156

Job	Run time
Checking if it's valid for JSR	11s
Deno	17s
Bun	5s
Fastly Compute	46s
AWS Lambda	44s
Lambda@Edge	46s
Main	1m 46s
Type & Bundle size Check on PR	56s
Node.js v18.18.2	54s
workerd	52s
Node.js v20.x	46s
Type & Bundle size Check on Main	0s
Node.js v22.x	54s
Coverage	8s
	9m 5s

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