[ox/std] Add CString type alias

(synced from a6e24ff2b6)

src/ox/std/types.hpp

@@ -61,6 +61,8 @@ using uint_t = unsigned;
 
 namespace ox {
 
+using CString = char const*;
+
 /**
  * Aliases type T in size and alignment to allow allocating space for a T
  * without running the constructor.