Cleanup includes

Reorder a few includes, include "position.h" where it was previously missing
and apply include-what-you-use suggestions. Also make the order of the includes
consistent, in the following way:

1. Related header (for .cpp files)
2. A blank line
3. C/C++ headers
4. A blank line
5. All other header files

closes https://github.com/official-stockfish/Stockfish/pull/4763
fixes https://github.com/official-stockfish/Stockfish/issues/4707

No functional change

src/evaluate.h

@@ -20,13 +20,11 @@
 #define EVALUATE_H_INCLUDED
 
 #include <string>
-#include <optional>
-
-#include "types.h"
 
 namespace Stockfish {
 
 class Position;
+enum Value : int;
 
 namespace Eval {