Typed Datasets, Local Executor

This is a new release! Major improvements:

• Datasets can be typed, allowing type checkers like pylance and mypy to follow types through the system. This should aid in the editing experience.
• A local executor for xAOD's has been added.

What's Changed

• Typed Datasets & Local Executor by @gordonwatts in #37
• No Col Specified, No Col to access by @gordonwatts in #46
• Fix up the README by @gordonwatts in #45

Full Changelog: 1.1.3...2.0