The SDL.h include is only valid for macOS because of memset_pattern4, on
Windows it is not required.

The character and weapon sprites have been updated.

Properly add SDL mocks for macOS.

Extract tests from source directory.

Only free memory that are dynamically allocated.

Implement and fix list functions and their tests.

Use modes for list teardown calls to prevent pollution of the tracked
calls.

Convert list to doubly-linked list for easy traversal.

Use node pointers instead of duplicating the find function logic.

Make colored console output work in Windows.

Separate mock library from source.

Put mocks to directory structure mimicking project structure.

Instead of using macros, use iterators built-in on each list for
filtering and traversing.

Remove symlinks and make codebase use common modules instead.

Allow current item pointer to have custom type.

Change the pool list initializations.

Add memory and data-related implementations for handling game data.