feat: Alerting module architecture to make it easy to use and extensible by external crates

Co-authored-by: Jean-Gabriel Gill-Couture <jg@nationtech.io>
Reviewed-on: #61
Reviewed-by: johnride <jg@nationtech.io>
Co-authored-by: Willem <wrolleman@nationtech.io>
Co-committed-by: Willem <wrolleman@nationtech.io>

examples/monitoring/src/main.rs

@@ -0,0 +1,25 @@
+use harmony::{
+    inventory::Inventory, maestro::Maestro,
+    modules::monitoring::kube_prometheus::helm_prometheus_alert_score::HelmPrometheusAlertingScore,
+    topology::K8sAnywhereTopology,
+};
+
+#[tokio::main]
+async fn main() {
+    let alerting_score = HelmPrometheusAlertingScore { receivers: vec![] };
+    let mut maestro = Maestro::<K8sAnywhereTopology>::initialize(
+        Inventory::autoload(),
+        K8sAnywhereTopology::from_env(),
+    )
+    .await
+    .unwrap();
+
+    //let monitoring = MonitoringAlertingScore {
+    //    alert_receivers: vec![],
+    //    alert_rules: vec![],
+    //    scrape_targets: vec![],
+    //};
+    //maestro.register_all(vec![Box::new(monitoring)]);
+    maestro.register_all(vec![Box::new(alerting_score)]);
+    harmony_cli::init(maestro, None).await.unwrap();
+}