Tristan Otterpohl

Add option to specify namespace of metrics

1

If not already possible, i would like for the metrics to be namespaced if a namespace option was specified ``` autometrics.Init( autometrics.WithNamespace("imaginary_application"), ) ``` `function_calls_duration_seconds_count` would become `imaginary_application_function_calls_duration_seconds_count` if this...

### Is there an existing issue already for this bug? - [X] I have searched for an existing issue, and could not find anything. I believe this is a new...