feat: point navbar dropdown to API, SDK, and CLI landing pages

[TC-MO]

Replace the eleven items in the "APIs, SDKs & CLI" dropdown with three links to the section landing pages (/api, /sdk, /cli); the detailed links now live on those pages. Extend activeBaseRegex with (/|$) so the dropdown also highlights as active on the bare landing-page URLs, not only their sub-pages.

@barjin this will supersede #2761

[apify-service-account]

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[barjin]

Thank you @TC-MO !

I'll be honest - I don't really love the UI 😅

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The navbar also worked as a language switcher between JS / Python SDKs or Clients. Now, if I accidentally land on a JS SDK page (when looking for Python), I'll have to make a loop through the landing page, which adds friction.

Anyway, the code looks fine (aside from the comment), I'll leave the UI to you guys. Approving.

[barjin]

This doesn't seem to work. See workarounds under facebook/docusaurus#5954 (setting activeClassName: 'navbar__link--active', not sure if it still works).

[TC-MO]

Thanks for comments @barjin. Good points, I think we are now trying to work within constraints of current UI, and we will definitely be making bigger redesigns and account for language switching.

[TC-MO]

BTW @barjin is there a way then where we could preserve the highlight on the dropdown if on /sdk /cli or /api ?

[barjin]

is there a way then where we could preserve the highlight

I believe that's what I mentioned here, no?

#2765 (comment)

I'm not sure the ways described there do still work, but the thread seems authoritative enough.

Lmk if that doesn't work, we can definitely try hacking it somehow

[TC-MO]

oh right 🤦 my bad still hazy after catching up after a hiatus :D will try this, if it doesn't work I'll let you know