feat: add discovery

Signed-off-by: kjuulh <contact@kjuulh.io>

crates/churn/src/agent/agent_state.rs

@@ -1,5 +1,9 @@
 use std::{ops::Deref, sync::Arc};
 
+use crate::api::Discovery;
+
+use super::{config::AgentConfig, discovery_client::DiscoveryClient, grpc_client::GrpcClient};
+
 #[derive(Clone)]
 pub struct AgentState(Arc<State>);
 
@@ -23,10 +27,24 @@ impl Deref for AgentState {
     }
 }
 
-pub struct State {}
+pub struct State {
+    pub grpc: GrpcClient,
+    pub config: AgentConfig,
+    pub discovery: Discovery,
+}
 
 impl State {
     pub async fn new() -> anyhow::Result<Self> {
-        Ok(Self {})
+        let config = AgentConfig::new().await?;
+        let discovery = DiscoveryClient::new(&config.discovery);
+        let discovery = discovery.discover().await?;
+
+        let grpc = GrpcClient::new(&discovery.process_host);
+
+        Ok(Self {
+            grpc,
+            config,
+            discovery,
+        })
     }
 }