Add nimtrace

[copyleftdev]

Add nimtrace

nimtrace — Zero-cost, structured, span-based tracing framework for Nim, inspired by Rust's tracing crate.

• URL: https://github.com/copyleftdev/nimtrace
• License: MIT
• Method: git
• Tags: tracing, observability, opentelemetry, logging, instrumentation, library

Features

• Structured spans and events with typed fields
• Zero-cost when disabled (-d:nimtraceDisabled)
• Thread-local span stacks (no locks)
• Pluggable subscribers (fmt, JSON, OTLP)
• Environment-based filtering
• Async context propagation
• Auto-instrumentation via {.traced.} pragma
• Pure stdlib, no external dependencies
• 100 tests passing on default GC and ORC

[Araq]

100 tests passing on default GC and ORC

default GC is ORC, isn't it.