website/integrations: chronograf: document (#12474)

* website/integrations: chronograf: init

Adds the version proposed in 8ac6761920/website/integrations/services/chronograf/index.md .

Signed-off-by: 4d62 <github-user@sdko.org>

* website/integrations: chronograf: start cleanup

Adds a `sidebar_label`, updates the start of the documentation to the follow the template, and updates `service.company` to `chronograf.company` in the preparation documentation.

Signed-off-by: 4d62 <github-user@sdko.org>

* website/integrations: chronograf: add to sidebar

Adds the integration to the `sidebarsIntegration.js` file.

Signed-off-by: 4d62 <github-user@sdko.org>

* website/integrations: chronograf: main body

Rewrite most of the documentation, cleanup unneeded bits, and update format.

Signed-off-by: 4d62 <github-user@sdko.org>

* website/integrations: chronograf: finishing touches

This PR is now ready for review. Cleans up sentence structure, grammar, and visual stuff.

Signed-off-by: 4d62 <github-user@sdko.org>

* website/integrations: chronograf: lint

Links modified file with prettier.

Signed-off-by: 4d62 <github-user@sdko.org>

* website/integrations: chronograf: add `USE_ID_TOKEN=true`

Adds `USE_ID_TOKEN=true` to the list of needed environment following this comment in the initial merge request:  https://github.com/goauthentik/authentik/pull/7766#issuecomment-1951393510

Signed-off-by: 4d62 <github-user@sdko.org>

* website/integrations: chronograf: apply review suggestions

Applies suggestions from the first review round

---------

Signed-off-by: 4d62 <github-user@sdko.org>

website/sidebarsIntegrations.js

@@ -137,6 +137,7 @@ module.exports = {
                     type: "category",
                     label: "Monitoring",
                     items: [
+                        "services/chronograf/index",
                         "services/gatus/index",
                         "services/glitchtip/index",
                         "services/grafana/index",