chore: 🤖 Add strict .npmrc file (#5118)

[mfranzke]

Proposed changes

Original contribution: #5118

Types of changes

• Bugfix (non-breaking change that fixes an issue)
• New feature (non-breaking change which adds functionality)
• Refactoring (improvements to existing components or architectural decisions)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)

Further comments

[changeset-bot]

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Latest commit: 65e363c

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[github-actions]

🔭🐙🐈 Test this branch here: https://db-ux-design-system.github.io/core-web/review/refactor-reintegrate-npmrc

[mfranzke]

we should merge #4631 previous to this PR, as pnpm seems to allowed our own pre- and post-Node-scripts to still run even though that we set ignore-scripts to true (which is pnpms default setting anyhow).