Add mobile navigation functionality

[rasvanjaya21]

Proposed changes

https://developers.cloudflare.com/

Subject Matter

Developer Experience / Documentation UX

Content Location

Main header

Additional information

No response

[rasvanjaya21]

I noticed that on the mobile view there is no navigation menu available, which feels like a missing functionality for users browsing Cloudflare Docs on smaller devices. I would like to work on this enhancement and contribute the mobile nav implementation.

[kodster28]

Dupe of #25570

[rasvanjaya21]

I opened this issue two weeks ago, this #25570 should duplicate my issue, not me wkwkwk @kodster28 .