Implement Base Split Contract

[boulder225]

🎯 Problem to be solved

Split implementations are duplicated across various split implementations. This redundancy leads to a less efficient codebase, making it harder to maintain, more prone to errors, and less secure.

🛠️ Proposed solution

• Implement a BaseSplit contract as a common foundation for all split types.
• Develop a BaseSplitFactory contract to facilitate the creation of different split implementations.
• Ensure the BaseSplit contract allows method overriding for different split types.
• Refactor existing split implementations to inherit from the new BaseSplit contract