[EPIC] Haki system / paths

**Is your feature request related to a problem? Please describe.**

- Haki, just like in the Anime, is needed

**Describe the solution you'd like**

1. Need a haki system
2. probably a level-based stat
3. will also need to make different kinds, probably based on specific actions
4. Probably need to have that tied into how a Devil fruit works

**Describe alternatives you've considered**

- Haven't put much more thought into how it will work

**Additional context**
N/A

No files, tests, or entry points are identified. First define the level-based Haki system, its different kinds, and how it interacts with Devil fruits; the work is done when those behaviors are specified and implemented with validation for each supported path.

Written by the indexing model from the issue text.