Reorganized the module structure.

src/graph/app.js

@@ -0,0 +1,32 @@
+/**
+ * Get an Azure application by its display name.
+ *
+ * @param { Object } client 
+ * @param { string } appName 
+ * @returns 
+ */
+export async function getApp(client, appName) {
+  const result = await client
+    .api("/applications")
+    .filter(`displayName eq '${appName}'`)
+    .get();
+
+  // Return the first application found or null if none exists
+  return result.value.length > 0 ? result.value[0] : null;
+}
+
+export async function createApp(client, appName) {
+  const app = await client.api("/applications").post({
+    displayName: appName,
+  });
+
+  if (!app || !app.appId) {
+    throw new Error("Failed to create application");
+  }
+
+  return app;
+}
+
+export async function deleteApp(client, appObjectId) {
+  await client.api(`/applications/${appObjectId}`).delete();
+}