Implement Monlet MVP stack and UI updates

deploy/showcase/agents/resolve.toml

@@ -0,0 +1,25 @@
+hostname = "agent-resolve"
+state_dir = "/var/lib/monlet-agent"
+
+[labels]
+scenario = "resolve"
+role = "showcase"
+
+[server]
+enabled = true
+url = "http://server:8000"
+token = "monlet-dev-token"
+heartbeat_interval = "5s"
+batch_interval = "3s"
+
+[metrics]
+enabled = false
+listen = "127.0.0.1:9465"
+
+[[checks]]
+id = "flapping"
+name = "Flapping check (critical then ok)"
+command = "/opt/monlet/checks/flapping.sh"
+interval = "5s"
+timeout = "3s"
+dedupe_key = "agent-resolve:flapping:retry"