feat(core): Introduce object store service (#7225)

Depends on https://github.com/n8n-io/n8n/pull/7220 | Story:
[PAY-840](https://linear.app/n8n/issue/PAY-840/introduce-object-store-service-and-manager-for-binary-data)

This PR introduces an object store service for Enterprise edition. Note
that the service is tested but currently unused - it will be integrated
soon as a binary data manager, and later for execution data.
`amazonaws.com` in the host is temporarily hardcoded until we integrate
the service and test against AWS, Cloudflare and Backblaze, in the next
PR.

This is ready for review - the PR it depends on is approved and waiting
for CI.

---------

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

packages/core/src/ObjectStore/utils.ts

@@ -0,0 +1,16 @@
+import { Stream } from 'node:stream';
+import { parseStringPromise } from 'xml2js';
+import { firstCharLowerCase, parseBooleans, parseNumbers } from 'xml2js/lib/processors';
+
+export function isStream(maybeStream: unknown): maybeStream is Stream {
+	return maybeStream instanceof Stream;
+}
+
+export async function parseXml<T>(xml: string): Promise<T> {
+	return parseStringPromise(xml, {
+		explicitArray: false,
+		ignoreAttrs: true,
+		tagNameProcessors: [firstCharLowerCase],
+		valueProcessors: [parseNumbers, parseBooleans],
+	}) as Promise<T>;
+}