Add illustrations to OpenTurns frontpage

[KieranDelamotte]

We add illustrations to OT frontpage.

In this PR we give images and links that redirect to examples as seen in the following figure.

[jschueller]

there not much in calibration & graphs, maybe we could stick to the 6 previous boxes, besides the page gets a bit tall with 3 lines, what do you think ? Another thing is that the probabilistic modeling image is way bigger, boxes should try to be even Also, now that there are more images maybe the carousel could go away so the green banner could be shrunk splitting the text on two columns.

[josephmure]

@jschueller @KieranDelamotte @mbaudin47

there not much in calibration & graphs, maybe we could stick to the 6 previous boxes, besides the page gets a bit tall with 3 lines, what do you think ?

The boxes are supposed to fit the sections of the Examples index, aren't they? Is it a problem if some sections have less content than others?

In my opinion, every section should be represented on the front page.

Concerning Calibration specifically, I think we are going to enlarge the section in the future anyway.

Concerning Graphs, perhaps the question is rather whether or not we need it as a section. There is already a small Graphics subsection in Data analysis with 2 examples:

• Visualize clouds (could be put in the Sample analysis subsection)
• Visualize pairs (could be put in the Estimate dependency and copulas subsection)

The Graphs section itself contains 3 examples:

• A quick start guide to graphs (could be put in the Manage data and samples subsection of Data analysis)
• How to fill an area (could be put in the Distributions subsection of Probabilistic modeling)
• Plot the log-likelihood contours of a distribution (could be put in the Distributions subsection of Probabilistic modeling)

Another thing is that the probabilistic modeling image is way bigger, boxes should try to be even

Agreed. Do you have a specific picture in mind?

Also, now that there are more images maybe the carousel could go away so the green banner could be shrunk splitting the text on two columns.

Do you mean the picture at the top of the page? I like it... :(