feat(metrics): dockerized grafana dashboard to visualize node metrics

[RolandSherwin]

Description

The ./metrics/readme.md contains the steps to start the dashboard. Should be as simple as executing a single command.

Summary generated by Reviewpad on 04 Oct 23 11:33 UTC

This pull request includes the following changes:

1. The Cargo.toml file:

   • A new member, "metrics", has been added to the workspace.

2. The Cargo.lock file:

   • Multiple package versions have been updated.

3. The metrics/README.md file:

   • Instructions for collecting and visualizing metrics from Safe Network nodes using Prometheus and Grafana have been added.

4. The metrics/Cargo.toml file:

   • The version of the walkdir dependency has been updated.

5. The metrics/dashboard.yml file:

   • A new configuration file for a Grafana dashboard has been added.

6. The metrics/docker-compose.yml file:

   • A new Docker Compose configuration for running Prometheus and Grafana services has been added.

7. The lib.rs file:

   • Two new modules, "metrics" and "metrics_service", have been added under the "open-metrics" feature.

8. The event.rs file:

   • Conditional compilation attributes have been added to record Kademlia and Gossipsub events for network metrics.

9. The main.rs file:

   • Various changes have been made, including import statements, definition of constants and data structures, and implementation of functions related to metrics collection.

Please review these changes carefully and ensure they are intended. Let me know if you need more information or have any questions.