New analytics section

[guimachiavelli]

Currently, we have a "Cloud" section for cloud-only features. This PR continues our move towards a "cloud-first documentation" approach by creating a dedicated documentation section for the analytics and monitoring features. It also expands the analytics documentation by adding a small reference for /events and the click and conversion events.

[meili-bot]

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[gmourier]

We could benefit from a proper section on user identification and the total user metric. The X-MS-USER-ID is a bit hidden inside a callout. I had a customer request how to get the right Total Users metric while running the searches from the backend side.

Happy to help!

[macraig]

Super clear and easy to read 👌

Edit: @gmourier is the technical expert on these, so my review is mostly from a user's perspective not a technical one

[CaroFG]

👌

[gmourier]

All good to me as well for the part being delivered here @guimachiavelli, next iteration would be to think of the user identification via X-MS-USER-ID!

[guimachiavelli]

Your wish is my command, @gmourier. I wrote a very short guide on X-MS-USER-ID. Should improve visibility and give clear indications of what users need to do.

Can you take a quick look?

[gmourier]

Thanks for the guide about X-MS-USER-ID @guimachiavelli, I tried to add precisions by reworking some sections! Let me know if it's unclear 🙏

cc @curquiza @brunoocasali A way to ease the DX for cloud users using SDKs and in the need to provide their custom way to identify their users across search analytics would be to instantiate the client with the userId so the X-MS-USER-ID header is sent for search requests and events (when they will there in the SDKs!)

[guimachiavelli]

Obtained final approval via private message. Merging.