Feature/eslint 9

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commit: 38378cc

[Copilot]

Pull Request Overview

This PR migrates the project's configuration to the new ESLint 9 flat config while making several related improvements in the build and test setups.

• Introduces a new eslint.config.mjs that imports and applies the flat config from @neolution-ch/eslint-config-neolution.
• Updates rollup.config.mjs for clearer import syntax and removes duplicate sourcemap properties.
• Refactors enum utility functions and improves error handling in localStorage alongside minor test adjustments.
• Removes the legacy .eslintrc.cjs file in favor of the new ESLint configuration.

Reviewed Changes

Copilot reviewed 8 out of 10 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
eslint.config.mjs	Adds the new ESLint 9 flat config and customizes the unicorn/no-null rule
rollup.config.mjs	Updates the nodeResolve import style and removes duplicate sourcemap definitions
src/lib/enum.ts	Refactors enum utility functions by replacing findIndex with indexOf
CHANGELOG.md	Updates documentation to reflect the migration to ESLint 9 flat config
src/lib/localStorage.ts	Changes the thrown error to a TypeError for unsupported localStorage support
src/lib/localStorage.spec.ts	Refactors test for expiration by switching to Date.now
.eslintrc.cjs	Removes legacy ESLint configuration in favor of the new flat config

Files not reviewed (2)

• .eslintignore: Language not supported
• package.json: Language not supported

[github-actions]

Package	Line Rate	Branch Rate	Complexity	Health
main	100%	100%	0	✔
Summary	100% (110 / 110)	100% (58 / 58)	0	✔