feat: update AI subject generation and handling responses

- Refactor AIGenerateSubjectInput type to include optional fields for updates.
- Add handling for "asignaturas" responses in OpenAI webhook.
- Implement crear.ts for creating/updating subjects based on AI responses.
- Update tests to validate OpenAI file uploads instead of storage uploads.

supabase/functions/openai-webhook-responses/asignaturas/index.ts

@@ -0,0 +1,25 @@
+import type { OpenAI } from "openai";
+import { ResponseMetadata } from "../../_shared/utils.ts";
+import { handleCrearAsignaturaResponse } from "./crear.ts";
+
+export async function handleAsignaturasResponse(
+  response: OpenAI.Responses.Response,
+): Promise<void> {
+  const metadata = response.metadata as ResponseMetadata | null;
+  const accion = metadata?.accion;
+
+  if (!accion) {
+    console.warn("No se recibió metadata.accion para asignaturas");
+    return;
+  }
+
+  switch (accion) {
+    case "crear":
+    case "actualizar":
+      await handleCrearAsignaturaResponse(response);
+      return;
+    default:
+      console.warn("Acción no reconocida para asignaturas:", accion);
+      return;
+  }
+}