adding github actions for checking the live version of the framework online using gh pages

[aniketdharia]

Subject of the issue/enhancement/features

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• version (AT/Framework)
• which browser and its version
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[swashbuck]

@oliverfoster @cahirodoherty-learningpool Can this issue be closed now that we have #3479 ? The linked PR has already been closed.

[oliverfoster]

Could you try to implement it please? The idea is to ha e a built version of the course automatically published to a git pages repo. I can explain further if you need. It's a good idea this.