feat(docs): automatic links to Web IDE from code blocks in Cookbook

[novusnota]

Issue

Closes #913.

Checklist

• I have updated CHANGELOG.md
• I have run the linter, formatter and spellchecker
• I did not do unrelated and/or undiscussed refactorings

Preview

See the small "Open in Web IDE" buttons on bottom right side of each (!) code block:

[anton-trunov]

Is is possible to move the links somewhere to the top of the code snippets?

[novusnota]

Is is possible to move the links somewhere to the top of the code snippets?

Yes, but I believe it's a bit worse since it kinda breaks the flow of the text. I can change the z-index or make it float, but that would overlap with text sometimes.

I've also tried extending the code blocks themselves and introducing another button adjacent to the copy button, but because the button's HTML/CSS were so rigid that attempt failed. They (expressive code plugin) have great extensibility and API for various cool transformations on code blocks, but have no robust way to add another button :)

[novusnota]

Right now I'm removing such buttons from code blocks with signatures in the Reference section mainly

[anton-trunov]

I would also say that opening links in Web IDE mostly makes sense for complete contracts.

[novusnota]

That was my original thought too, but then I decided to allow all code samples but the ones in signatures — that way users can quickly tinker with any examples. But we may only allow such links for Cookbook examples, that's also fine

[anton-trunov]

But we may only allow such links for Cookbook examples, that's also fine

yeah, let's start with Cookbook first and if there is popular demand, we will add more links