feat: start with functionality

ref: N25B-400

src/pages/MonitoringPage/MonitoringPageAPI.ts

@@ -0,0 +1,19 @@
+const API_BASE = "http://localhost:8000/"; // Change depending on Pims interup agent/ correct endpoint
+
+
+/**
+ * Sends an API call to the CB for going to the next phase. 
+ * In case we can't go to the next phase, the function will throw an error.
+ */
+export async function nextPhase(): Promise<void> {
+  const res = await fetch(`${API_BASE}/experiment/next`, {
+    method: "POST",
+    headers: {
+      "Content-Type": "application/json",
+    },
+  });
+
+  if (!res.ok) {
+    throw new Error("Failed to advance to next phase");
+  }
+}