[C++] Add duplicated fields detection in FURY_FIELD_INFO macro

[PragmaTwice]

What do these changes do?

It will prevent such code to be successfully compiled:
(previously, such code can be compiled without error, which make code error-prone.)

struct A {
  int x;
  float y;
};

FURY_FIELD_INFO(A, x, y, x); // compile error: duplicated fields in FURY_FIELD_INFO arguments are detected

Besides, we move type traits to meta/type_traits.h.

[chaokunyang]

LGTM, awsome meta programing tricks