[ENH] Introduce Serialization Support

[achieveordie]

Part of #145 - Introduces serialization functionality.

Currently, this is a direct port from the functionality we have in sktime. I'll iteratively improve the code as per requirements and inputs.

What does this implement/fix? Explain your changes.

• [x] Port serialization methods (load as a standalone function, save as BaseObject method) from sktime
• [ ] Add tests to ensure the functionalities added work properly and are consistent with the expected behaviour.
• [ ] Improve/add code to ensure this functionality can be generally applied and extended.

Does your contribution introduce a new dependency? If yes, which one?

None

What should a reviewer concentrate their feedback on?

• since bandit complains about the usage of pickle. I've excluded two tests (import and load) and will add a warning in load's docstring regarding it. We should try to find safer alternatives to replace it in the future.
• What improvements should we bring to the current code? Some nice-to-have functionalities etc

Any other comments?

PR checklist

For all contributions

• [x] I've reviewed the project documentation on contributing
• [ ] I've added myself to the list of contributors.
• [x] The PR title starts with either [ENH], [CI/CD], [MNT], [DOC], or [BUG] indicating whether the PR topic is related to enhancement, CI/CD, maintenance, documentation, or a bug.

For code contributions

• [ ] Unit tests have been added covering code functionality
• [x] Appropriate docstrings have been added (see documentation standards)
• [ ] New public functionality has been added to the API Reference