Add pyproject.toml and pylock.toml

[RytoEX]

Description

Pyproject.toml and pylock.toml are the official Python package configuration files, so let's use them.

Motivation and Context

Use official dependency/project management file specs. May also make Dependabot alerts more easily actionable.

How Has This Been Tested?

I haven't tested this yet. Would like to hear from people who more regularly work with Python if this is the right approach before finishing the implementation (making CI use this instead of requirements.txt).

Types of changes

• New feature (non-breaking change which adds functionality)

Checklist:

• I have read the contributing document.
• My code has been run through clang-format.
• My code follows the project's style guidelines
• My code is not on the master branch.
• My code has been tested.
• All commit messages are properly formatted and commits squashed where appropriate.
• I have included updates to all appropriate documentation.