New nav bar

[thelevicole]

1. Implemented new navigation bar for both desktop and mobile.
2. Implemented galaxy tracking events on nav clicks.
3. Added Inter stylesheet from google fonts.

Preview: https://clickhouse-docs-git-new-nav-bar-clickhouse.vercel.app/docs

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2 out of 3 committers have signed the CLA.

:white_check_mark: justindeguzman
:white_check_mark: clickhouse-adrianfraguela
:x: thelevicole
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[clickhouse-adrianfraguela]

@justindeguzman would you mind taking a look at this and let @thelevicole know of any changes? This just adds the new nav as well as Galaxy events to it. But not the whole docs site. He can do that if needed, just let him know