Support Elixir among our SDKs

A ticket to track support for a set of Elixir SDKs. These should support:

• Error Monitoring
• Logging

This is a good starting point on how to make an SDK for Highlight.io: https://www.highlight.io/docs/general/company/open-source/contributing/adding-an-sdk

And like all of our other SDKs, we should wrap the OTEL equivalent: https://opentelemetry.io/docs/instrumentation/erlang/

For anyone interested in contributing, please post here. We're happy to help. cc @Vadman97 @et

The SDK should implement the following:

• a way to H.recordException following the otel exception reporting spec.
• a way to instrument Elixir logging libraries. if the Elixir sdk supports logs natively, it would be great to route them to as LogRecords on v1/logs, but if not, fine to support them as trace events.
• Integrate cleanly with Phoenix, allowing to hook into built in error monitoring and logging.

as part of the exception implementation, if Elixir backend frameworks follow a common format for tracing HTTP request handlers, it would be great to wrap those as native otel traces.

Requirements:

• a init method that sets up the Elixir instrumentation to collect console logs automatically.
• a recordException method that allows capturing errors manually (see java sdk as an example).
• support Phoenix Live View instrumentation