feat(core): Add support for signed URLs for binary data (#14492)

Co-authored-by: कारतोफ्फेलस्क्रिप्ट™ <aditya@netroy.in>

packages/core/src/binary-data/binary-data.config.ts

@@ -0,0 +1,8 @@
+import { Config, Env } from '@n8n/config';
+
+@Config
+export class BinaryDataConfig {
+	/** Secret for creating publicly-accesible signed URLs for binary data */
+	@Env('N8N_BINARY_DATA_SIGNING_SECRET')
+	signingSecret?: string = undefined;
+}