Add "Integration" section under Cloud

[beriberikix]

Shortly we'll be adding different cloud to cloud integrations (like Grafana) and don't have a place to put related documentation. I propose we add a new topl-level section under "Cloud" labeled "Integrations."

I can envision different types of integrations. For example, we may have a UX in the console, or a plugin that a user can install or just some sample code . Over time we'll need to decide what lives in the docs versus elsewhere (like a Github Readme) but we'll address that as the number of Integrations grow.

[hasheddan]

I believe this has been addressed by the Data Destinations section (https://docs.golioth.io/data-routing/destinations/). @beriberikix feel free to close if so 👍🏻

[beriberikix]

Indeed 😊