OpenTelemetry derive macro implementations

Implementation of derive macros for OpenTelemetry.

Overview

OpenTelemetry is a collection of tools, APIs, and SDKs used to instrument, generate, collect, and export telemetry data (metrics, logs, and traces) for analysis in order to understand your software's performance and behavior.

This crate provides the implementation of derive macros, it should not be used directly, but through the opentelemetry-derive crate.