Prepare custom rules for ESLint v9

[tido64]

Describe the bug

The upcoming major release of ESLint includes several breaking changes for rule authors: https://eslint.org/blog/2023/09/preparing-custom-rules-eslint-v9/

To Reproduce

n/a

Expected behavior

n/a

Screenshots

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Desktop (please complete the following information):

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Smartphone (please complete the following information):

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Additional context

Intro to ESLint's new config format: https://eslint.org/blog/2022/08/new-config-system-part-2/

[mkacmar]

Merged in https://github.com/microsoft/eslint-plugin-sdl/pull/60