[data visualization] integrate grafana for block processing data

[bitwiseguy]

Currently replayor writes all of its data points into an array in a json file. We should build an integration with grafana so that the data points are plotted and can be easily visualized:

• Define a grafana dashboard + panels with json so that it can be easily imported into any grafana instance
• In grafana, configure the JSON API or Infinity data source to point to the JSON file location
• Use JSONPath expressions to extract the relevant fields from the json data structure
• Include readme steps for how to setup the integration (i.e. document anything that is not automated and has to be done manually)