Add Pydantic for profile validation

[chrisoro]

• Implemented Pydantic for profile validation, ensuring that all user input conforms to expectations and eliminating the need for type checking or error handling after initial validation. Additionally, Pydantic provides improved output for users to assist them in defining valid profiles.
• Refactored dataloader.py to accommodate validation within Pydantic Models.
• Updated README documentation.
• Overhauled profiles distributed with the installation. Outdated profiles have been replaced by an example profile demonstrating correct syntax and usage, with a focus on structure rather than specific content (or a particular character/build).
• Renamed all Models in config/modely.py to include the suffix Model, clearly indicating that these are validated user inputs.
• Restructured item/filter.py for improved clarity and reduced complexity. The code path is now easier to understand, with fewer side effects.
  • Introduced filter types to affixPool, starting with the initial type called count. count functions similarly to the count filter in the PoE trade website.
  • This refactor facilitates the addition of other possible filter types without breaking existing ones. The previous logic, which mixed and/or in one type, was not future-proof and had flaws.
• Expanded unit test coverage for all new features and refactors.

[aeon0]

Smooth, tested, works.