Improve eslint setup

[jpzwarte]

• Use the new flat config eslint setup (https://eslint.org/docs/latest/use/configure/configuration-files-new)
• Add a new @sl-design-system/eslint-config package so others can reuse out eslint configuration
• Add specific plugins for a11y, web components, testing, storybook etc.
• Improve performance of listing components by running eslint once for all components instead of separately for each component

[changeset-bot]

🦋 Changeset detected

Latest commit: 467a783

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 44 packages

Name	Type
@sl-design-system/inline-message	Patch
@sl-design-system/message-dialog	Patch
@sl-design-system/breadcrumbs	Patch
@sl-design-system/radio-group	Patch
@sl-design-system/editorial-suite	Patch
@sl-design-system/my-digital-book	Patch
@sl-design-system/sanoma-learning	Patch
@sl-design-system/button-bar	Patch
@sl-design-system/text-field	Patch
@sl-design-system/checkbox	Patch
@sl-design-system/skeleton	Patch
@sl-design-system/textarea	Patch
@sl-design-system/popover	Patch
@sl-design-system/spinner	Patch
@sl-design-system/tooltip	Patch
@sl-design-system/itslearning	Patch
@sl-design-system/avatar	Patch
@sl-design-system/button	Patch
@sl-design-system/dialog	Patch
@sl-design-system/drawer	Patch
@sl-design-system/editor	Patch
@sl-design-system/select	Patch
@sl-design-system/shared	Patch
@sl-design-system/switch	Patch
@sl-design-system/bingel-int	Patch
@sl-design-system/badge	Patch
@sl-design-system/bingel-dc	Patch
@sl-design-system/card	Patch
@sl-design-system/form	Patch
@sl-design-system/grid	Patch
@sl-design-system/icon	Patch
@sl-design-system/menu	Patch
@sl-design-system/tabs	Patch
@sl-design-system/clickedu	Patch
@sl-design-system/magister	Patch
@sl-design-system/nowa-era	Patch
@sl-design-system/myvanin	Patch
@sl-design-system/bingel	Patch
@sl-design-system/kampus	Patch
@sl-design-system/neon	Patch
@sl-design-system/teas	Patch
@sl-design-system/max	Patch
@sl-design-system/locales	Patch
@sl-design-system/eslint-config	Patch

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[github-actions]

🕸 Storybook preview

You can view a preview here (commit 467a7834e28f496bd8dbd1799c7f048ec73d61e5).

[github-actions]

🕸 Website preview

You can view a preview here (commit 467a7834e28f496bd8dbd1799c7f048ec73d61e5).