[Docstring] Implement Missing Docstrings for verticapy/machine_learning/vertica/tsa Module

[oualib]

We currently lack docstrings for various base classes in the verticapy/machine_learning/vertica/tsa module. It's crucial to have comprehensive documentation to aid users and contributors.

For this one, we need to update all the functions of the different base class. The example should be simple and then refer to the other classes.