Add eslint GitHub workflow

[sandercamp]

What

Explain what changes inside the code, this can be as simple or complicated as you want as long as it's clear

Why

Explain why these things are changes. This explanation is for your colleagues and your future self.

Code Review

Please consider the following checklist when reviewing this Pull Request.
More background and details here.

• Does the code actually solve the problem it was meant to solve?
• Is the code covered by unit tests? Integration tests?
• Does anything here need documentation? (Focus on why, not what.)
• Does any of this code deal with privacy sensitive information or affects security? Ask an additional reviewer.
• Is the code easy to understand and change in the future?
• Is the same code or concept duplicated? Find a balance between DRYness and readability.
• Does the code reasonably adhere to the Kabisa coding standards?
• Be kind.

[github-advanced-security]

This pull request sets up GitHub code scanning for this repository. Once the scans have completed and the checks have passed, the analysis results for this pull request branch will appear on this overview. Once you merge this pull request, the 'Security' tab will show more code scanning analysis results (for example, for the default branch). Depending on your configuration and choice of analysis tool, future pull requests will be annotated with code scanning analysis results. For more information about GitHub code scanning, check out the documentation.