Greatly improve extensibility.

**Is your feature request related to a problem? Please describe.**
autostack is very tightly coupled to python. However, the goal is to make it so that it can be extended to be used with any language.

**Describe the solution you'd like**
Use this repository as the autostack "core," decoupled from python.

**Describe alternatives you've considered**
N/A

**Additional context**
N/A