SerenityOS support

[RobertBendun]

The main issue is that current compiler is 64bit specific, so we need to work on that.

Changes as of cf74cc3 to make compiler compile:

• Remove any usage of Boost arguments parsing
• Use fmtlib in header only mode, and before each include declare namespace std { using wstring = std::basic_string<wchar_t>; }
• Issue with pow function, due to beeing on 32 bits

Serenity has port of NASM, so this is not an issue.

Obviously, std needs to be rewritten, maybe some compile time checking of target?