Adding opentelemetry_quantum + opentelemetry_heroku to this project

[tomtaylor]

Hello, we've implemented two libraries for OpenTelemetry that we'd like to offer to this project.

• opentelemetry_quantum: Implements telemetry handlers for the Quantum cronjob library
• opentelemetry_heroku: Implements a resource detector for applications running on Heroku

Happy to keep maintaining these separately, but I'd love to see them maintained alongside the other libraries if that's useful.

[tsloughter]

Great! Would love to have them in here, and you can remain on as an approver for those particular libs in this repo.

The only issue is the Heroku one should be in Erlang. I think Otel Quantum is fine in Elixir since that is a library for Elixir. Happy to help, if you need it, with the conversion.

[tomtaylor]

Brilliant, thanks. I totally forgot the Heroku one should be in Erlang! My Erlang is a bit rusty, but I can give it a go on a branch and share to check I've got the right approach? It's a very simple library - shouldn't be hard to port over.

[tsloughter]

Sounds good :+1:

[tomtaylor]

Could you give this a look over when you get a moment? I've tried to reimplement it in Erlang, but my Erlang is very rusty!

[tsloughter]

Looks good! But need to update https://github.com/breakroom/opentelemetry_heroku/blob/main/rebar.config#L25