Add secret sync vercel integration

backend/src/services/app-connection/vercel/vercel-connection-service.ts

@@ -0,0 +1,29 @@
+import { logger } from "@app/lib/logger";
+import { OrgServiceActor } from "@app/lib/types";
+
+import { AppConnection } from "../app-connection-enums";
+import { listProjects as getVercelProjects } from "./vercel-connection-fns";
+import { TVercelConnection } from "./vercel-connection-types";
+
+type TGetAppConnectionFunc = (
+  app: AppConnection,
+  connectionId: string,
+  actor: OrgServiceActor
+) => Promise<TVercelConnection>;
+
+export const vercelConnectionService = (getAppConnection: TGetAppConnectionFunc) => {
+  const listProjects = async (connectionId: string, actor: OrgServiceActor) => {
+    const appConnection = await getAppConnection(AppConnection.Vercel, connectionId, actor);
+    try {
+      const projects = await getVercelProjects(appConnection);
+      return projects;
+    } catch (error) {
+      logger.error(error, "Failed to establish connection with Vercel");
+      return [];
+    }
+  };
+
+  return {
+    listProjects
+  };
+};