Fix client_config.json not used in packaged builds

[pyrogamer0209]

Normally you put the client_config.json next to the LeapC.dll and it is used automatically. This works in the Editor but not for packaged builds.

The provided solution mimics the expected behaviour. The LeapWrapper checks the expected path in the Plugin's Directory and initializes the server_namespace with the file content. If no file is given the default behaviour is used.

We tested it with:

• Pico Neo 3 Eye Pro
• Unreal Engine 5.2
• Ultraleap Plugin v4.11.0
• LeapC.dll v5.17.1

[Fritte795]

The important changes are in LEAP_CONNECTION* FLeapWrapper::OpenConnection(LeapWrapperCallbackInterface* InCallbackDelegate, bool UseMultiDeviceMode) starting from line 99. The other changes are auto formatting.