TODOs.txt

* Update instructions to use -C instead of -f.
* Switch to relative paths in includes.
  - Then clangd can work without any compile file/database.
* Check if -g is needed in all compilation commands to enable debugging.
  - Will also need to delete <executable>.dSYM/ in the output dir.
* Refactor data structures so they're impls that require typed layers.
  - Goal is to avoid struct allocation, only allocate underlying buffer.
  - Try structs + function pointers.
  - But more likely will need generic impls, with define wrappers for each type.
  - Otherwise will need to continue with struct allocation.
- Data Structures
  * Create "array_map" (associative array, without hashing).
  * Create "array_list".
  * Create "hash_map".
* Switch to size_t instead of int when applicable.
* Figure out if ArrayDeque needs realloc or malloc for storage resizing.
* Switch from malloc to calloc?
  - Slower but will prevent getting non-0 values at the begining.
* Change ArrayDeque storage to be last field so I can do single allocation?
* Switch from int to uintx_t from stdint.h?
* Make a no pointer/malloc version of data structures.
  - Either stack based or using handles (IDs).
* Adopt IWYU.
  - https://github.com/include-what-you-use/include-what-you-use
  - https://cmake.org/cmake/help/latest/prop_tgt/LANG_INCLUDE_WHAT_YOU_USE.html
* Who is reponsible for freeing elements stored in ArrayDeque?
* Code all these allocators:
  - https://www.gingerbill.org/series/memory-allocation-strategies/
* Re-structure Makefiles to allow for caching.