Apply DInvoke to `LoadLibrary()` and `GetProcAddress()` WinApi

Try using DInvoke to Obfuscate `LoadLibrary()` and `GetProcAddress()` WinApi, taking reference from [SharpSploit](https://github.com/cobbr/SharpSploit/blob/master/SharpSploit/Execution/DynamicInvoke/Native.cs), to hide them from getting detected from _static analysis_. [Change the name of the functions taken from _SharpSploit_ project]