feat: send program to backend in the latest form

ref: N25B-198

src/pages/VisProgPage/VisProg.tsx

@@ -109,9 +109,20 @@ function VisualProgrammingUI() {
 
 // currently outputs the prepared program to the console
 function runProgram() {
-  const program = graphReducer();
-  console.log(program);
+  const phases = graphReducer();
+  const program = {phases}
   console.log(JSON.stringify(program, null, 2));
+  fetch(
+    "http://localhost:8000/program",
+    {
+      method: "POST",
+      headers: {"Content-Type": "application/json"},
+      body: JSON.stringify(program),
+    }
+  ).then((res) => {
+    if (!res.ok) throw new Error("Failed communicating with the backend.")
+    console.log("Successfully sent the program to the backend.");
+  }).catch(() => console.log("Failed to send program to the backend."));
 }
 
 /**