style: add type hints, update few functions

[stasfilin]

Hi there,

I've made some minor updates to the project and submitted them in this pull request. The changes I've made include:

1. Creating a separate function called "execute_workflow" to handle the execution functionality.
2. Including more type hints to make the code clearer.
3. Adding docstrings to provide better documentation.

This is my first pull request to improve the codebase's style, but I plan to make more soon. Please take a look and let me know if you have any feedback.

Thank you!

[theacodes]

Looks good, thank you!