Add VS Code extension URL to GitHub repo About section

[karlhorky]

Is your feature request related to a problem? Please describe.

It would be great to have a link to the VS Code extension in the About section of this repo (can be added by clicking on the gear icon):

Describe the solution you'd like

Already described above.

Describe alternatives you've considered

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Additional context

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[daidodo]

Thanks for the feedback!

Done!

[karlhorky]

Great, thanks!