Feat: Pydantic config integration

[taddyb]

Issue Addressed

Description

Fixes #66

• Added a pydantic base class / classes to manage training configs
• changed the training script to take in a config file as it's path
  • You can run training now using python scripts/train.py --config-name example_config.yaml
• created an example config to remove the user sharing updated configs
• updated tests and code references

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Code cleanup/refactor
• Documentation update

Other (please specify):

Checklist

• Branch is up to date with master
• Updated tests or added new tests
• Tests & pre-commit hooks pass
• Updated documentation (if applicable)
• Code follows established style and conventions