[WIP] node/metrics: add telemetry package

[jchappelow]

No description provided.

[jchappelow]

Tips:

docker run --rm -p 4318:4318 -p 9464:9464  -v $(pwd)/contrib/otel/otel-config.yaml:/etc/otel-config.yaml \
    otel/opentelemetry-collector-contrib   --config /etc/otel-config.yaml
docker run --rm -p 9090:9090   -v $(pwd)/contrib/otel/prom.yaml:/etc/prometheus/prometheus.yml   prom/prometheus

Point Grafana to prom @ port 9090.

Alt, use InfluxDB instead of prom.