Option to include visualized pipelines in the generated document

Description

An option to include the image of visualized pipelines in the Sphinx document generated by kedro build-docs command

Context

kedro-viz offers kedro viz command that can generate interactive visualized pipelines.

This visualization is very useful to explain to the stakeholders and it is even nicer to automate the manual operation to run kedro viz command, access the URL, take a screenshot, and paste it in the document.

![image](https://user-images.githubusercontent.com/33908456/61184262-542f8000-a67e-11e9-872e-3fa40e31b81c.png)

Possible Implementation

Programmatically communicate with the kedro_viz.server.

Possible Alternatives

Use a graph visualization tool such as graphviz.

[idanov]

Hi @Minyus, this sounds like a very interesting feature and I agree that it can be useful to add the pipeline graph to the docs. Since this feature request is more of a request to the kernel-viz plugin, rather than Kedro, maybe we can have the feature request posted https://github.com/quantumblacklabs/kedro-viz instead.

The implementation of this feature may prove to be quite involved, since it will require running the kedro-viz frontend in a headless browser and then take a screenshot there, which could be used for the docs. Given that this feature is nice to have and not very important for the user’s workflow, but quite high on the effort, I will put it as low priority.

[Pet3ris]

Hi @Minyus, what sort of document would you like the image to be pasted in? Currently Kedro doesn’t really produce any soft deliverables apart from perhaps the automated documentation. But providing the visualization there feels like a special case.