feat: Add setup for Rust environment and implement test workflows

apps/nxmesh-agent/src/service/master_handler.rs

@@ -0,0 +1,38 @@
+use std::sync::Arc;
+
+use nxmesh_proto::ConfigUpdate;
+use tracing::info;
+
+use crate::connector::master::MasterConnector;
+
+#[async_trait::async_trait]
+pub trait MasterHandler {
+    async fn on_config_update(
+        &self,
+        config_info: ConfigUpdate,
+    ) -> Result<(), Box<dyn std::error::Error + Send + Sync>>;
+}
+
+pub struct MasterHandlerImpl {
+    settings: Arc<crate::config::settings::Settings>,
+}
+
+impl MasterHandlerImpl {
+    pub fn new(settings: impl Into<Arc<crate::config::settings::Settings>>) -> Self {
+        Self {
+            settings: settings.into(),
+        }
+    }
+}
+
+#[async_trait::async_trait]
+impl MasterHandler for MasterHandlerImpl {
+    async fn on_config_update(
+        &self,
+        config_info: ConfigUpdate,
+    ) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+        info!("Received config update from master: {:?}", config_info);
+
+        Ok(())
+    }
+}