refactor: modularize into core/events/formatters/drivers

src/events/parse.ts

@@ -0,0 +1,15 @@
+import type { WebhookEvent } from "../types";
+
+export function parseEvent(headers: Record<string, string>, body: string): WebhookEvent | null {
+  const event = headers["x-github-event"];
+  const signature = headers["x-hub-signature-256"];
+
+  if (!event) return null;
+
+  try {
+    const payload = JSON.parse(body);
+    return { event, payload, signature };
+  } catch {
+    return null;
+  }
+}