Create da.lua

[duckodas]

Description

My pull request fixes or adds a new language, Danish, since a lot of new servers in Denmark are starting to use QBCore. I'm just adding a translation file for it. And that's why I want to help the Danish FiveM Community so they don't have to translate this.

Checklist

• [x] I have personally loaded this code into an updated qbcore project and checked all of its functionality.
• [x] My code fits the style guidelines.
• [x] My PR fits the contribution guidelines.

[github-actions[bot]]

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