Move repo & deployment to TU Delft org

[sammeltassen]

I've created a GH organisation to gather all the public digital output of our team:

https://github.com/tu-delft-heritage

It would be great if this repository could be moved there as well.

We can also take over the Netlify deployment (I still need to create a team for that). This would give us more direct insight into the site usage, and access to the deploy logs.