Update the docs related to the split system/Withdrawal Contribution

[boulder225]

🎯 Problem to be solved

The existing documentation lacks clear instructions and visuals for the split system or "Withdrawal Contribution". This could confuse users who try to understand and utilize it.

🛠️ Proposed solution

• [ ] Review the current documentation related to the split system/Withdrawal Contribution
• [ ] Update the documentation with step-by-step instructions on how to use the split system/Withdrawal Contribution feature
• [ ] Include relevant screenshots or visuals to help users better understand the process