Dependency on Giraffe feels excessive for the amount of HTML templating performed by the library

[nbevans]

The Giraffe dependency should be reconsidered.

I understand it simplifies the HTML templating code - but really, the cost of the additional dependency is excessive, and there isn't that much HTML templating in the library anyway.

Unless there are plans to massively increase the amount of HTML templating in a future version of Plotly.NET I would suggest refactoring away from the Giraffe dependency.

Open to discussion