Organization cleanup, stage arena to Scratch_Arena

core_main.cpp

@@ -258,10 +258,8 @@ For modules it's a bit different cause they should be distributed as valid.
 */
 
 #include "base.cpp"
-
 #define STB_SPRINTF_IMPLEMENTATION
 #include "stb_sprintf.h"
-
 #include "base_unicode.cpp"
 #include "base_arena.cpp"
 #include "base_data_structures.cpp"