Merge pull request #1024 from iRevive/docs/ecosystem

docs: add sttp and tapir to the ecosystem

Author: iRevive

docs/ecosystem.md

@@ -5,9 +5,16 @@
 | [otel4s-experimental][otel4s-experimental]           | An experimental functionality: instrumented `cats.effect.std.Queue`, runtime metrics, `@span` annotation, and so on. |
 | [http4s-otel4s-middleware][http4s-otel4s-middleware] | [Http4s][http4s] middleware for seamless integration of tracing and metrics.                                         |
 | [otel4s-doobie][otel4s-doobie]                       | [Doobie][doobie] integration with Otel4s providing traces of database queries.                                       |
+| [sttp][sttp]                                         | sttp 4.x provides [metered][sttp-metrics] and [traced][sttp-tracing] backends.                                       |
+| [tapir][tapir]                                       | Tapir supports [server traces][tapir-tracing] via otel4s.                                                            |
 
 [otel4s-experimental]: https://github.com/typelevel/otel4s-experimental
 [http4s-otel4s-middleware]: https://github.com/http4s/http4s-otel4s-middleware
 [http4s]: https://github.com/http4s/http4s
 [otel4s-doobie]: https://github.com/arturaz/otel4s-doobie
 [doobie]: https://github.com/tpolecat/doobie
+[sttp]: https://github.com/softwaremill/sttp
+[sttp-metrics]: https://sttp.softwaremill.com/en/latest/backends/wrappers/opentelemetry.html#metrics-cats-effect-otel4s
+[sttp-tracing]: https://sttp.softwaremill.com/en/latest/backends/wrappers/opentelemetry.html#tracing-cats-effect-otel4s
+[tapir]: https://github.com/softwaremill/tapir
+[tapir-tracing]: https://tapir.softwaremill.com/en/latest/server/observability.html#otel4s-opentelemetry-tracing