feat(validator): Introduce `responseValidator` #6155

Job	Run time
Bun	6s
Fastly Compute	47s
Checking if it's valid for JSR	10s
Deno	14s
AWS Lambda	46s
Lambda@Edge	48s
Main	1m 44s
Node.js v18.18.2	50s
Node.js v20.x	46s
Type & Bundle size Check on Main	0s
Type & Bundle size Check on PR	1m 3s
Node.js v22.x	46s
workerd	54s
Coverage	8s
	9m 2s

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