fix(#185): add `langaugeOptions.parserOptions` to flat preset / read `sourceType` w/ fallback #471

Job	Run time
Lint and Test with Node.js 18 and ESLint 8.56 on macos-latest	1m 24s
Lint and Test with Node.js 18 and ESLint 8 on macos-latest	1m 38s
Lint and Test with Node.js 18 and ESLint 9 on macos-latest	1m 52s
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 19s
Lint and Test with Node.js 20 and ESLint 9 on macos-latest	10s
Lint and Test with Node.js 22 and ESLint 8.56 on macos-latest	4s
Lint and Test with Node.js 22 and ESLint 8 on macos-latest	6s
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 26s
Lint and Test with Node.js 18 and ESLint 9 on ubuntu-latest	1m 22s
Lint and Test with Node.js 20 and ESLint 8.56 on ubuntu-latest	1m 29s
Lint and Test with Node.js 20 and ESLint 8 on ubuntu-latest	1m 30s
Lint and Test with Node.js 20 and ESLint 9 on ubuntu-latest	1m 30s
Lint and Test with Node.js 22 and ESLint 8.56 on ubuntu-latest	1m 14s
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 9s
	20m 6s

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