fix(native-federation-typescript): enable remote string resolution from object

[gg-wis]

Description

Currently cannot resolve a remote entry from an object, which is allowed in both OriginJS Federation plugin and standard WebPack Federation plugin. This is because the retrieveRemoteStringUrl function only accepts a string as an entry at the moment.

Related Issue

https://github.com/module-federation/core/issues/3512

Types of changes

• [ ] Docs change / refactoring / dependency upgrade
• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)

Checklist

• [x] I have added tests to cover my changes.
• [x] All new and existing tests passed.
• [x] I have updated the documentation.