feat(validator): Introduce `responseValidator` #6150

Job	Run time
Deno	14s
Bun	4s
Checking if it's valid for JSR	10s
Main	1m 45s
Fastly Compute	46s
AWS Lambda	44s
Node.js v18.18.2	50s
Lambda@Edge	50s
Node.js v20.x	45s
Type & Bundle size Check on PR	57s
Node.js v22.x	51s
workerd	56s
Type & Bundle size Check on Main	0s
Coverage	8s
	9m 0s

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