fix(#185): add `langaugeOptions.parserOptions` to flat preset / read `sourceType` w/ fallback #474

Job	Run time
Lint and Test with Node.js 18 and ESLint 8.56 on macos-latest	1m 21s
Lint and Test with Node.js 18 and ESLint 8 on macos-latest	1m 30s
Lint and Test with Node.js 18 and ESLint 9 on macos-latest	1m 40s
Lint and Test with Node.js 20 and ESLint 8.56 on macos-latest	1m 23s
Lint and Test with Node.js 20 and ESLint 8 on macos-latest	1m 10s
Lint and Test with Node.js 20 and ESLint 9 on macos-latest	5s
Lint and Test with Node.js 22 and ESLint 8.56 on macos-latest	1s
Lint and Test with Node.js 22 and ESLint 8 on macos-latest	1s
Lint and Test with Node.js 22 and ESLint 9 on macos-latest	1s
Lint and Test with Node.js 18 and ESLint 8.56 on ubuntu-latest	1m 20s
Lint and Test with Node.js 18 and ESLint 8 on ubuntu-latest	1m 20s
Lint and Test with Node.js 18 and ESLint 9 on ubuntu-latest	1m 23s
Lint and Test with Node.js 20 and ESLint 8.56 on ubuntu-latest	1m 30s
Lint and Test with Node.js 20 and ESLint 8 on ubuntu-latest	1m 22s
Lint and Test with Node.js 20 and ESLint 9 on ubuntu-latest	1m 18s
Lint and Test with Node.js 22 and ESLint 8.56 on ubuntu-latest	1m 22s
Lint and Test with Node.js 22 and ESLint 8 on ubuntu-latest	1m 9s
Lint and Test with Node.js 22 and ESLint 9 on ubuntu-latest	1m 17s
	19m 13s

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