refactor(utils/mime): make object and type commonality #5826

Job	Run time
Fastly Compute	58s
Deno	13s
Bun	13s
Checking if it's valid for JSR	10s
AWS Lambda	1m 5s
Lambda@Edge	1m 3s
Main	1m 58s
Node.js v18.18.2	1m 5s
perf-measures-type-check-on-main	0s
perf-measures-type-check-on-pr	20s
Node.js v20.x	1m 7s
workerd	1m 11s
Node.js v22.x	1m 6s
Coverage	19s
	10m 48s

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