(MOD) Implemented Array_Equals.
(MOD) Replaced struct member "description" from InstanceStillAlive from "Given instance was yet alive." to "Given instance was still alive.".
(MOD) Removed String_GetIdx and String_SetIdx: Meaningless functions.
(MOD) Changed the assignment value of struct member "identity" of macro unknown, normal and error from "nameof(e)" to "e.identity".
This is the very first version that pass the compiler. Though it has lots things were made for testing, such as commenting problematic source code to avoid irrelevant errors. For test.c, everything is working fine. Congrats!
