free-programming-books style: change theme

What does this PR do?

Improve repo

For resources

Description

I changed the theme from minimal to cayman, you can see the new page here: https://luigiimvector.github.io/free-programming-books/ The UI wasn't very nice, as said on #5491.

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Check the status of GitHub Actions and resolve any reported warnings!

Jul 02 '22 17:07 LuigiImVector

not crazy about the cayman theme, esp on desktop. I would like to push people towards the dynamic site, which uses minimal theme. Need feedback from others!

Jul 03 '22 14:07 eshellman

Just giving my opinion, I prefer the cayman style to the current one

Jul 09 '22 01:07 CleanMachine1

What do you think @davorpa ?

Jul 17 '22 19:07 LuigiImVector

What do you think @davorpa ?

I prefer the current minimal theme because is the most simple and fast.

Maybe change it's styles a bit extending jekyll theme due to official github-themes development are frozen since remote-theme gem has been appeared

Jul 17 '22 20:07 davorpa

for better understanding and experience, i think Cayman theme is good.

Sep 29 '22 06:09 YuvrajSHAD

I wonder if we could create a discussion poll or something for this? I like both themes and think it is mostly a toss up. So maybe letting the community decide would be a good option.

Jul 29 '23 15:07 Thenlie

yes, should be an issue. we need verification that the theme will also work on free-programming-books-search

Jul 30 '23 13:07 eshellman