docs: fix documentation formatting in IPermit3

[re1ro]

Address PR feedback:

• Fix @param name from 'levels' to 'nodes' in PermitNode struct
• Reorder @param documentation to match struct field order in PermitTree

Changes:

• Corrected parameter documentation to match actual struct fields
• Improved documentation clarity and consistency

[Copilot]

Pull request overview

This PR corrects documentation formatting issues in the IPermit3 interface to ensure parameter documentation matches the actual struct field definitions. The changes address inconsistencies between documented parameter names and field order versus the actual struct implementations.

• Fixed parameter name from 'levels' to 'nodes' in PermitNode struct documentation
• Reordered @param documentation in PermitTree to match struct field declaration order

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