fix(#185): add `langaugeOptions.parserOptions` to flat preset / read `sourceType` w/ fallback #467

Job	Run time
Lint and Test with Node.js 18 and ESLint 8.56 on macos-latest	1m 5s
Lint and Test with Node.js 18 and ESLint 8 on macos-latest	51s
Lint and Test with Node.js 18 and ESLint 9 on macos-latest	51s
Lint and Test with Node.js 20 and ESLint 8.56 on macos-latest	49s
Lint and Test with Node.js 20 and ESLint 8 on macos-latest	1m 7s
Lint and Test with Node.js 20 and ESLint 9 on macos-latest	1s
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	48s
Lint and Test with Node.js 18 and ESLint 8 on ubuntu-latest	47s
Lint and Test with Node.js 18 and ESLint 9 on ubuntu-latest	48s
Lint and Test with Node.js 20 and ESLint 8.56 on ubuntu-latest	44s
Lint and Test with Node.js 20 and ESLint 8 on ubuntu-latest	47s
Lint and Test with Node.js 20 and ESLint 9 on ubuntu-latest	48s
Lint and Test with Node.js 22 and ESLint 8.56 on ubuntu-latest	51s
Lint and Test with Node.js 22 and ESLint 8 on ubuntu-latest	58s
Lint and Test with Node.js 22 and ESLint 9 on ubuntu-latest	48s
	12m 6s

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