v0.1.0 of buildhut_telemetry

Battery-efficient OpenTelemetry log pusher, frame-rate performance tracer, and structured logger for Flutter. Sends OTLP/JSON v1 logs, traces, and metrics to BuildHut or any OTel Collector. Changelog excerpt: - Initial release. - OTLP/JSON v1 log, trace, and metric exporter with configurable endpoints, auth headers, batching, and retry with exponential backoff. - BuildhutLoggerwith severity levels (TRACE–FATAL), scoped loggers, trace-context correlation, and error/stackTrace capture. - FrameRateTracerusing Flutter FrameTimingcallbacks — reports FPS, average/max frame time, jank count, and missed-vsync count as OTLP metrics. - SpanTracerfor distributed traces with parent-child spans, events, s[...]