feat: Add "Back to top" links (to the TOC index)

[BSA10]

What does this PR do?

Improve repo

Why is this valuable (or not)?

I think this helps the reader to look around the Index very quickly.

Checklist:

• Read our contributing guidelines
• Search for duplicates.

Followup

• Check the output of Travis-CI for linter errors!

[eshellman]

see #5092
Be sure to check the free-programming-books-lint output for linter errors. Alphabetical order and spacing are the most common problems.

[davorpa]

Implements part of the proposal

• Improve big-file usability. Add "Return to Top" Links? #5092

for english and arabic languages

[BSA10]

Implements part of the proposal

• Improve big-file usability. Add "Return to Top" Links? #5092

for english and arabic languages

If it is fine i will add it to all the languages.

[davorpa]

Implements part of the proposal

• Improve big-file usability. Add "Return to Top" Links? #5092

for english and arabic languages

Do you want me to complete and add it to all the languages ?

ℹ️ Some feedback

• I have the spanish listings done. 😉
• Some listings are a bit more advanced on refactor(books): Split RE4B - Reverse Engineering For Beginners #5603. Maybe there will be conflicts.
• Also there are new listings/sections: Add Hebrew online books #5592 Add Hebrew online courses #5590 Added Remix IDE to the Playgrounds file #5598

It looks really pretty although in some parts with few resources seems a bit dense.

I would wait to see what @SethFalco or @eshellman thinks about with the purpose of avoid do more work than necessary

[eshellman]

Thank you for giving us a demo of "back-to-index" links. It's really valuable to the discussion in #5092.
It's a really bad time to merge something like this, though, because it's guaranteed to create conflicts for every other PR, of which we have a lot because of Hacktoberfest.
The things I notice, thanks to this work are

• significant overhead (and work for us) when new sections are created.
• seems like a lot of clutter with links after ever section
• each language will need localization

[BSA10]

Implements part of the proposal

• Improve big-file usability. Add "Return to Top" Links? #5092

for english and arabic languages

Do you want me to complete and add it to all the languages ?

ℹ️ Some feedback

• I have the spanish listings done. 😉
• Some listings are a bit more advanced on refactor(books): Split RE4B - Reverse Engineering For Beginners #5603. Maybe there will be conflicts.
• Also there are new listings/sections: Add Hebrew online books #5592 Add Hebrew online courses #5590 Added Remix IDE to the Playgrounds file #5598

It looks really pretty although in some parts with few resources seems a bit dense.

I would wait to see what @SethFalco or @eshellman thinks about with the purpose of avoid do more work than necessary

So I have to cover all the advanced listings and the new section ?

And yes the in few resource will be some dense i thought about it but should we do?

[BSA10]

Thank you for giving us a demo of "back-to-index" links. It's really valuable to the discussion in #5092. It's a really bad time to merge something like this, though, because it's guaranteed to create conflicts for every other PR, of which we have a lot because of Hacktoberfest. The things I notice, thanks to this work are

• significant overhead (and work for us) when new sections are created.
• seems like a lot of clutter with links after ever section
• each language will need localization

so, we put this aside and we have to figure out best solution for this.
Is that what you refer to?

[davorpa]

I propose align crosslink to the right

[eshellman]

I think static "link to index" would be too hard to maintain. Maybe a javascript that works on the github pages version?
closing this for now. Very much appreciate the PR, though.