Add "HTTP Service Discovery" section to integrations docs, similar to File SD section #2561
Description
Currently, the integration docs have a section showcasing some File SD integrations from the community.
I propose we add a similar section for HTTP Service discovery, highlighting some HTTP SD implementations from the community. Here's an initial list, for sake of discussion:
- fastly-exporter: https://github.com/fastly/fastly-exporter?tab=readme-ov-file#service-discovery
- ns1_exporter: https://github.com/tjhop/ns1_exporter?tab=readme-ov-file#http-service-discovery
- netbox, via plugin: https://github.com/FlxPeters/netbox-plugin-prometheus-sd
- netbox, via export templates: https://www.observability.blog/post/netbox_http_service_discovery/
- TDB