A fix for Blueprint Integration

[nassosterz-ms]

What this PR does / why we need it:

Updates the code to support the Blueprint implementation. Updates the documentation to reflect the updated correct Blueprint.

Also, renames the default port from UnrealGSDKHostPort to gameport

Special notes for your reviewer:

If applicable:

• [X] this PR contains documentation
• [ ] this PR contains unit tests
• [ ] this PR has been tested for backwards compatibility