Simplify & Improve Models Loading Logic

[micxudev]

Real example:

1. We want to load Weapon class from the YML file.
2. We also want to load Ammo from the YML file.
3. Both Weapon and Ammo extend Base class

Problem (solved):
Omit duplication of code when loading base attributes for each item.
E.g., all the fields from Base class should be loaded ONCE in one
method and used for all its inheritors.

Benefits:

• 1. Avoid base field duplication
• 2. Single source of truth for defaults
• 3. Extend Base without touching inheritors or loaders
• 4. Immutability and safety using record

Read about the approach which seems to achieve all of that and could be used for loading all QA models:
https://github.com/micxudev/QA_models_loading