feat(validator): Introduce `responseValidator` #6144

Job	Run time
Checking if it's valid for JSR	10s
Bun	9s
Fastly Compute	47s
Deno	17s
AWS Lambda	48s
Lambda@Edge	48s
Main	1m 32s
Node.js v18.18.2	49s
Node.js v20.x	49s
Type & Bundle size Check on Main	0s
Type & Bundle size Check on PR	1m 2s
workerd	56s
Node.js v22.x	51s
Coverage	0s
	8m 58s

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