make Cockpit Client more obvious on the website

[garrett]

I agree with this feedback, that we need to make Cockpit Client more obvious. We can do this on the website. We should probably revisit the website at the start of 2025, especially the front page.

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If you're using a Linux desktop, Cockpit Client is a desktop app that's able to use ssh key authentication.

We're in the same boat. This is an acceptable solution for us. I wish it was easier to find though. Thanks

Originally posted by @carrete in https://github.com/cockpit-project/cockpit/issues/17843#issuecomment-2506630307