feat: dutch locales

[vinckr]

Related Issue or Design Document

Checklist

• I have read the contributing guidelines and signed the CLA.
• I have referenced an issue containing the design document if my change introduces a new feature.
• I have read the security policy.
• I confirm that this pull request does not address a security vulnerability.
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Further comments

[Benehiko]

The JSON is incorrect on line 131 and needs a comma.
The variables in the text { variable } should not be translated. they are used to inject values into from Kratos.

[Benehiko]

I've fixed it up and it should be alright to merge

[vinckr]

Thanks Alano!