feat: Inject metrics registry in route controllers (#1477)

* wip metrics in controllers

* Cleanup of metrics util into own directory

* metrics registry injected in res object

* cleanup

* Route-based metrics by response object injection

* Delete .env

* resolve linting issues

* fix extrinsics metric

* update readme

* update on comments

* updated types to generics

* update private function to emit metrics on blocks

* update naming for metrics and README