📚 DOCS: Add big summary card

[choldgraf]

No description provided.

[codecov]

Codecov Report

Merging #404 (26a8db8) into master (553b7b8) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #404   +/-   ##
=======================================
  Coverage   90.65%   90.65%           
=======================================
  Files          14       14           
  Lines        1851     1851           
=======================================
  Hits         1678     1678           
  Misses        173      173           

Flag	Coverage Δ
pytests	90.65% <ø> (ø)

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[damianavila]

Do you have a picture of how this one looks like on Twitter?

[choldgraf]

I can't preview this PR directly on twitter because the ReadTheDocs preview blocks robot scraping, but here's what it looks like now:

and here's what "large size" twitter cards look like (in this case it's a GitHub preview link):

so for wide-style logos I think the large image summary is better