Customize freecodecamp illustrations

[benoit74]

Currently, all freecodecamp ZIMs use the same illustration from FCC: https://dev.library.kiwix.org/#lang=&q=freecodecamp

I think we should customize these illustrations so that it is more compelling to someone searching among freecodecamp ZIMs.

We can reuse SVGs from https://www.freecodecamp.org/ homepage (see section "Earn free verified certifications with freeCodeCamp's core curriculum").

Obviously we need to implement openzim/freecodecamp#79 first

@Popolechien WDYT?

[Popolechien]

Yes but I worry that these illustrations are black/transparent: then what happens if users are in dark mode?

[benoit74]

• the ZIM illustrations are PNG, so we will decide on proper colors on our own (probably transparent background and some greyish-blueish color for the logo)
• even inside the ZIM, so far the ZIMs do not support dark mode, so even in dark mode the ZIM background is white ... and the logo whatever color we will choose (but I do not - yet - intend to use these logos inside the ZIM)

[benoit74]

Done: https://library.kiwix.org/#q=freecodecamp (there will soon be some with original FCC logo: the all versions)