fix: Stop failing to open project due to duplicate package references.

[Doprez]

PR Details

I kept running into an issue with packages being referenced in an external project but with a different version making GameStudio completely fail to open. This just adds a check in the PackageSession to make sure to only load the newest version to avoid the reference collisions that were happening.

Cause of the issue:

New Warning message should be a lot clearer and allows the person to still open the project instead of blocking them:

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My change requires a change to the documentation.
• I have added tests to cover my changes.
• All new and existing tests passed.
• I have built and run the editor to try this change out.